Malicious PDF — malware analysis report

Static analysis result for SHA-256 8410a72a10457294…

MALICIOUS

PDF

40.4 KB Created: 2020-08-16 17:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 932ee4a30f783b972b78d12eeba3cb07 SHA-1: 0ab808f1a20b5ed1238d3498017475d920db1ff9 SHA-256: 8410a72a10457294c60235e13824198015ddfdc073e30f3bd527fb3a08a3758d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs, suggesting a link farm or SEO manipulation tactic to lure users. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=alelos+multiples+pdf In PDF document text
    • http://files.staloysiuschurch.com/uploads/1/3/1/6/131637362/601794.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/1/0429/3882/6918/files/govatij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/english_to_russian_dictionary_with_pronunciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/gexuvekedagajovigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/que_es_la_anemia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/86458049977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/zogofaguvegujovowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9321/3855/files/xupatejesupugefunazazeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/12155468678.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_off000061d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 4872 bytes
SHA-256: de600a706210fad34bb22d6a5984f952d813d9f6d6fbfdfd0f0389d36bf3d486
font_01_sfnt_off00007255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 10204 bytes
SHA-256: 8774dc4cf7918e4f3dca353ed86eb12b064eb21f894f58e718068282fb431fcf

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