Malicious PDF — malware analysis report

Static analysis result for SHA-256 258f4005ad8b7359…

MALICIOUS

PDF

40.8 KB Created: 2020-07-12 18:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5dd023217c8cf6bf3e9663a137044c60 SHA-1: 7333937aaf564957d34111ccf6f55002fc6a7738 SHA-256: 258f4005ad8b7359c65f8bb9aac330364bbb9071a19041b041d06acd67cab820
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/wb?keyword=estrellas%20fugaces%20pdf'. The document body also contains this URL and numerous other PDF links, suggesting a link farm or redirection tactic to distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/wb?keyword=estrellas%20fugaces%20pdf In PDF document text
    • http://files.ahacroatian.com/uploads/1/3/1/3/131379776/lamevetez_lujetugukidopo_fusudutax.pdfIn PDF document text
    • http://files.wazzuor.com/uploads/1/3/1/4/131437660/tisezez_dutewonuf_pevewufumix_ginowunotunokem.pdfIn PDF document text
    • http://files.markpetering.org/uploads/1/3/0/7/130738596/wejibi-kadavelazipoju-vodelosu.pdfIn PDF document text
    • http://files.falmouthwaterfront.com/uploads/1/3/1/3/131383581/fanalipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fagasufirosi.files.wordpress.com/2020/06/jigukufotonexuz.pdfIn PDF document text
    • https://xusogoresob.files.wordpress.com/2020/07/22402241503.pdfIn PDF document text
    • https://lininolo.files.wordpress.com/2020/07/besoziju.pdfIn PDF document text
    • https://duxogij.files.wordpress.com/2020/06/mumomi.pdfIn PDF document text
    • https://regowom.files.wordpress.com/2020/06/9031479281.pdfIn PDF document text
    • https://mufipesat.files.wordpress.com/2020/07/17859152265.pdfIn PDF document text
    • https://ripefobol.files.wordpress.com/2020/07/jaxuxezarex.pdfIn PDF document text
    • https://sewotij.files.wordpress.com/2020/07/nonijopixokulegojavete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/14675610155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/siloposidaxuvefiwime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/40228099396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/83570750241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.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
🗂 Part of campaign: falmouthwaterfront.com 3 samples

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 4896 bytes
SHA-256: 7e8553d54b37468174f28b86271a510628454237a89616d55a87a9182d5628b3
font_01_sfnt_off0000730e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 10844 bytes
SHA-256: 3a75c7cab26c024f5f117ed2d8ed1dd2d896599c3b653448683bab698e84a544

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