Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d24735871ecab33…

MALICIOUS

PDF

60.1 KB Created: 2020-10-18 14:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 37770336885314570b6e09276d23e482 SHA-1: 458fc5cf7fd0fb2bc28dcd549adb3d9087815cda SHA-256: 8d24735871ecab33700079d59796ee35ac316bc9b1376e73760248b608171392
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to disposable hosting services, suggesting a link farm designed for SEO manipulation or to obscure malicious redirects. One prominent URL, 'https://ggtraff.ru/strik?keyword=dusk+till+dawn+mp3', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF files, likely as part of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=dusk+till+dawn+mp3 In PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/tutofuziromoto.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/6429934.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zofamabam.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/3f8ef8ba19db5.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/xukorek-sonijusalunok-jotobugepo.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/2022221.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/fojateb.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/lonofari.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9777323.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/2937554.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6204283.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/rumalax-gixasufusez-labunajigom-popado.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/bobopezasakidag-vujaponulo-xorevigelid.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/jenupe.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/27b8fc5a0.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/tagerezupubiji.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/poralizetugit.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/6e1d5a156.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/5280501.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7967/4272/files/website_2_apk_builder_pro_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9970/8315/files/22346630926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8010/9218/files/sigmund_freud_psychoanalytic_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1042/8575/files/michael_buble_wedding_songs_everything_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8af81b8-1656-4ff9-b1f5-33d2cbfc28fb/wijagomes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6102158-5865-4210-b6be-6dd862bc3a43/zuxudaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898de1ff-84d9-4f85-9fb5-ca82dab30884/lasowokigukexivo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 3036 bytes
SHA-256: d4b8dbed21dd3dba04fa8873ae956d7131e28a559a759339e36a4255c752c499
font_01_sfnt_off00007846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7846 2900 bytes
SHA-256: b7b260ddf4d191b6a327e24a8ce6e5bade73ba5b9f71a273ff02e8128d3bb49a
font_02_sfnt_off000082a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A2 5328 bytes
SHA-256: 8c70825fbaeb323b493eea25c99f5f3487f43449c09618eef528bace00285667
font_03_sfnt_off000094c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C0 2140 bytes
SHA-256: 49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594
font_04_sfnt_off00009e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9A 10240 bytes
SHA-256: dcc4650cb6b89c69c72199c11b80b63578b42c13db5fb1149f2eb5832cdc03d7
font_05_sfnt_off0000c20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20A 18776 bytes
SHA-256: 1df41416ece054d3cca32f135e48dc95f4d9c8a2bff4ba4edba1d14e21aabef6

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