Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a74c3ed3bdd3aba…

MALICIOUS

PDF

42.7 KB Created: 2020-08-26 05:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 781ec54112a946f8ba1d6f06f5e32a77 SHA-1: 4efcbedf903fe2526e990171371ae83f40486cb7 SHA-256: 4a74c3ed3bdd3aba53c03267ab4293ecb937d957eb8954648469cb12df27c7b0
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, with a keyword suggesting a lure. Another heuristic flagged the document as a link farm, containing many external PDF links, predominantly hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=boeing+737-+800+cockpit+layout+pdf, reinforcing the malicious redirector finding.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=boeing+737-+800+cockpit+layout+pdf In PDF document text
    • http://xefugubo.judyzpiano.com/uploads/1/3/0/9/130969220/pakexeroxib.pdfIn PDF document text
    • http://dapudokoj.waltercomputer.com/uploads/1/3/2/6/132682787/6939659.pdfIn 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/1/0430/0944/1953/files/berabodisiribevafabalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2693/9042/files/74041892985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/kularesorulikunugikobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/91922541351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/local_hero_arrested_after_killing_30_pedophiles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/mepokefusimulisun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/faregodisavitatix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/doodle_god_guide_chapter_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/7974207299.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

Related samples 2

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_off0000661e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661E 5876 bytes
SHA-256: d32a7bd6c2d1b1c2c9b183e413410ae98fffaffed462492b0d80fd15e060749d
font_01_sfnt_off00007a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4D 10604 bytes
SHA-256: c2e7dfcb43c78dbcd9122b792d41e37b59abd0bfd5e7b807defe8cd3c1e06d9f

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