Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2bb2c4478010f9…

MALICIOUS

PDF

45.4 KB Created: 2020-10-08 02:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7b46693e4d2bccf57daaca5d4be2cb8f SHA-1: 20efe81f5d23a3547ebda234931e05190754bddf SHA-256: 4b2bb2c4478010f9832a2a6b8519af46de06dc1800147e4e9c0c93659799dec9
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://gettraff.ru/strik?keyword=before+after+grammar+exercises+pdf In PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/29457635565.pdfIn PDF document text
    • https://site-1044416.mozfiles.com/files/1044416/lilomebasazupewavosopu.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/jonetiwawigasexa.pdfIn PDF document text
    • https://site-1039182.mozfiles.com/files/1039182/fusupovumixef.pdfIn PDF document text
    • http://files.cffu.org/uploads/1/3/2/6/132683111/bazakekukaxatiwi.pdfIn PDF document text
    • http://junamuk.sgrhoboston.org/uploads/1/3/1/3/131380345/wuvexa_favakaguze_dodomebagavim_fexobozotorakub.pdfIn PDF document text
    • http://files.stmatthewsbaptistchurch.com/uploads/1/3/0/7/130740455/1966502.pdfIn PDF document text
    • http://tukup.woodridgeswimclub.net/uploads/1/3/1/4/131482826/83746d3f8ed4a93.pdfIn PDF document text
    • http://files.harmoniousbeing.co.uk/uploads/1/3/0/9/130969220/31ed8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8639/0460/files/tpcastt_example_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8644/9313/files/42539395552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/mexico_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/modo_de_produccion_feudal_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780d4d69-e1a5-4c95-b72b-59e5b2cf764c/94339093964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dde2bf0-d489-49b7-bc2d-a9fc20f427cb/tozuwajotugonijilu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 5240 bytes
SHA-256: 9a1a83246e2e2e434ccbff42f10cea22600b297cdd7514355e719e37d1435818
font_01_sfnt_off000075d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 10688 bytes
SHA-256: aab43c812424e746d2a7649b1db513b8b3ed05d2b717c752d86324d709adaa14
font_02_sfnt_off00009a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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