Malicious PDF — malware analysis report

Static analysis result for SHA-256 a687991ae9494189…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 02:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ce3f5b5f1985129dca8ab4ffa69edf0 SHA-1: c61da5ce3a8b86ddfd89de2a1f81ae17de59fbdc SHA-256: a687991ae9494189c96730a04c686022c4029f26047d4d991b30712b0c2815f1
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 to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=accessory+organs+of+digestive+system+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to drive traffic to this malicious redirector.

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=accessory+organs+of+digestive+system+pdf In PDF document text
    • http://files.bernardramsdale.com/uploads/1/3/0/7/130740429/detanikolisesomomak.pdfIn PDF document text
    • http://files.cmc-tam.org/uploads/1/3/2/6/132695525/4516092.pdfIn PDF document text
    • http://files.aiswn.org/uploads/1/3/1/1/131163599/topopunagi_romab.pdfIn PDF document text
    • http://pogifuzid.nakedtrackdays.net/uploads/1/3/0/7/130775403/divusufopan.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/1/0436/9544/0040/files/64880425429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/13617251961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/vukupowelemumurazojita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/63249329609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/anne_frank_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/search_only_for_files_on_google.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/59004223879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/ccna_200_125_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3159/files/78195824822.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 8

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_off00006cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB6 5592 bytes
SHA-256: bbbb663cdd7d32957a45e7e09ced0518c54e95c7af3baa3c11cd5b7e3f26c8d7
font_01_sfnt_off00007fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBD 10236 bytes
SHA-256: 38ad235a027eea4344be49af713afafd8774572790412ce8b10fefc806e36d6e

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