Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd285e0ad0e39da…

MALICIOUS

PDF

37.8 KB Created: 2020-08-22 15:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7ec7c1fbc2c55b747a09f5cb573a483 SHA-1: da3096cc15b5e479f7d158b3234b277fbd4f2c94 SHA-256: 5bd285e0ad0e39da76cbfc7332f05282543f25741c1f1c15f1acf2d05f0fa2fe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to a redirector service, which in turn points to a large number of PDFs hosted on Shopify. This indicates a link farm or SEO poisoning tactic, likely designed to drive traffic to malicious content or phishing pages. The primary redirector URL is https://ttraff.ru/pify?keyword=homograph+homonym+homophone+worksheet, which is flagged as malicious. The document body, though heavily obfuscated, contains similar URLs and appears to be a lure for a worksheet.

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=homograph+homonym+homophone+worksheet In PDF document text
    • http://files.sensebysense.com/uploads/1/3/2/6/132681544/57c153c2.pdfIn PDF document text
    • http://files.bamyield.org/uploads/1/3/1/8/131856050/0a5d91.pdfIn PDF document text
    • http://dukipowen.peacejams.com/uploads/1/3/0/8/130814328/dalufulivase-dilezil-ximomitonule-kesufifafokewuf.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/1/0429/3486/1987/files/12986697192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/96237785640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7177/4366/files/pelezevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3937/0909/files/difijepenuziz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/nideb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/2ez_table_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/sufosikiguweminoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/37438784103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/relesama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1292/1256/files/wepodewaxuwunizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/tavezomek.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_off000055c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C6 5420 bytes
SHA-256: cf357e353f7588d535f012d75cbf0b50112f84b6cd3be61c060e9e5dbff6371a
font_01_sfnt_off00006827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6827 9992 bytes
SHA-256: 9434abab41ebdae83cb2a12079fc45a3eba694e15c0529a397715cb5cdcd54ef

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