Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a4b3c9e8e694b8…

MALICIOUS

PDF

40.3 KB Created: 2020-09-18 16:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 003efcbc8d5da1634d00781ee5aad92f SHA-1: 7257cc3f75ce2fa9f515a80351250cb20d061c83 SHA-256: c4a4b3c9e8e694b8a18c9cce1e17fc6489a20fe291d9dbd4005fa587bd4bb1b3
184 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.me', identified as a malicious redirector. Additionally, it features a large number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection strategy. The document body, though heavily obfuscated, also contains the 'cats mod apk revdl' string and the malicious URL, reinforcing the lure. The ML classifier also flagged this PDF with high confidence.

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.me/wix?keyword=cats+mod+apk+revdl In PDF document text
    • http://vipowoxoz.pioneervalleykennelclub.com/uploads/1/3/2/3/132302842/zonadonan-kotemafidu-komolibur.pdfIn PDF document text
    • http://pogeriv.offonatangent.co/uploads/1/3/1/4/131437252/lulej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3cea1a01-ab32-4d4d-a3c3-b6ec83edd9e3.filesusr.com/ugd/5c9621_c9a536be4af14a54ac309f4b4d8594e7.pdf?index=trueIn PDF document text
    • https://d8df5c7e-de38-44ab-a08a-04173e0aa642.filesusr.com/ugd/8a4248_6855863fa89e4550a206b8f4eea98933.pdf?index=trueIn PDF document text
    • https://73f8243a-b880-4747-9c73-a266223052b9.filesusr.com/ugd/0cd3a8_166acca2f6d24fb3ad07e13d6dee11d4.pdf?index=trueIn PDF document text
    • https://c96d87c1-7cc2-4550-b507-94493d2ac5ed.filesusr.com/ugd/941881_63d94045ccd94472bf271f2a6978aba8.pdf?index=trueIn PDF document text
    • https://32edf4fb-5f82-4150-b6d1-5007191e4b46.filesusr.com/ugd/275374_1c5085109d5842b6bc3170bd06845a9b.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/15109650679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/60629739852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/fusionner_2_fichiers_en_ligne.pdfIn PDF document text
    • https://fbc10157-f3d0-421c-b2d0-f7eda5aaa84a.filesusr.com/ugd/9b33c5_78d463cdbbeb410296da37dc9e0239d8.pdf?index=trueIn PDF document text
    • https://5547104c-df1b-4542-9008-737fe9efe1dc.filesusr.com/ugd/17159d_46e0df2b5556490db4445c82418cf44c.pdf?index=trueIn 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

Related samples 5

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_off00006009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 5136 bytes
SHA-256: dd81eaee2f523b9bff33a34fc3b8916816121516a212e01db1ff1ff06de002e2
font_01_sfnt_off0000716e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 10424 bytes
SHA-256: e9844bbb60479464714d65dd1e84e2a3a1eb05f4a0bca36b4866844f5764b657

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