Malicious PDF — malware analysis report

Static analysis result for SHA-256 6520c23068b92d9b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 07:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: affe72deb21d52dc22989aed2273dd7d SHA-1: b3e69c768d1f6cd33f0857fe2ccbae97d533c504 SHA-256: 6520c23068b92d9b2da003df4f3e148e01da59e04f163c88addade5a09b9bbc5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bond+amortization+excel+template', suggesting a phishing or scam lure. The presence of a large number of external PDF links also indicates a link farm or SEO manipulation tactic.

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.cc/pify?keyword=bond+amortization+excel+template In PDF document text
    • http://files.jorgenlauritzen.com/uploads/1/3/1/4/131453615/nokuvopi-wufolobisevi-zisatozumeritu-samesexujufa.pdfIn PDF document text
    • http://files.lizstory.com/uploads/1/3/1/4/131453395/7688503.pdfIn PDF document text
    • http://sowutoja.maryhicksmetalarts.com/uploads/1/3/2/6/132682871/biwut-vuwubidomivu.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/1/0435/8547/0623/files/rilejulinijinevabapevaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/sketch_3_coupon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/7344957607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/movefip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6050/2421/files/1738382223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/61255780520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0333/7114/files/vocabulary_list_for_ielts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/math_worksheets_for_grade_1_addition_and_subtraction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/21374967970.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 5

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_off00005d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 5208 bytes
SHA-256: 40a2a03ebb679683a29de80697385dace2fd5ce73ac22bfea9cbef475cbadd37
font_01_sfnt_off00006eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 10396 bytes
SHA-256: 7a1833d46e8870ee589225cec8d2d95a0dc638e4b36ad059b1eb2e1672d54162

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