Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f351c0979e51fb5…

MALICIOUS

PDF

36.4 KB Created: 2020-08-01 14:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da22b1ee81560c61cf09d10bb5297e10 SHA-1: fd45269e43908b137f7b16fe7e399b2467696ef6 SHA-256: 0f351c0979e51fb58b17203ee5fb9c74af14e021d34233d009e816b5ea69ebdc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but a critical heuristic identified a link to a known malicious redirector, 'ttraff.com'. This suggests a phishing or scam attempt, likely using the PDF as an attachment in a spearphishing campaign. The ML classifier strongly supports the malicious nature of this PDF.

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=1984+questions+and+answers In PDF document text
    • http://files.edmundzygowski.com/uploads/1/3/1/1/131163914/95a7804da766b.pdfIn PDF document text
    • http://files.drzamps-zgear.com/uploads/1/3/0/9/130968984/jexan-dunibodusiguje-gegogokazu.pdfIn PDF document text
    • http://files.shipanna.com/uploads/1/3/1/3/131379213/vekajisuvokiz.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/1/0434/8693/7253/files/sanunutisojefolemukinadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/wuzetajinokopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/rumetapoduxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/merorefala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/57824792124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/18208636091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8089/9991/files/56939226491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2261/3654/files/23226973269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/64815686928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/33987600518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3687/4651/files/ralufubebuwiparataf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/gafasusaladilulixaj.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 6

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_off00004fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC8 5400 bytes
SHA-256: 82101bb0b6e09ea5bb0dac5b8a2fae4725581bf35d0c97cb3f1dbd8a765c4bb1
font_01_sfnt_off00006246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 10216 bytes
SHA-256: 56c27290b9bf10fc38a7868adbd0863c9a5b3c560577b61f257cec87f548cece

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