Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bb2de69cb94600…

MALICIOUS

PDF

47.4 KB Created: 2020-08-09 01:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f115f18a190c6fe2cfb583c731482b69 SHA-1: 9d0f71b6820e49d69a28364b18d4f8b496b167e3 SHA-256: 81bb2de69cb946008bcd90202e2993fc66afb0d7fccc3afc152d26d96f2d02ac
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 known to host malicious content. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting an attempt to disguise its malicious nature. The presence of a link farm and redirector indicates a phishing or scam attempt, likely to deliver a secondary payload or lead the user to a credential harvesting page.

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=franchising+definition+pdf In PDF document text
    • http://wojevot.iamplurilingual.com/uploads/1/3/2/3/132302921/fofizunivijebi.pdfIn PDF document text
    • http://files.daniellamoffsonfoundation.com/uploads/1/3/2/7/132740435/da3b4.pdfIn PDF document text
    • http://files.victorxp.com/uploads/1/3/0/9/130969424/1453534.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/76677596416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/capacitors_nptel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0244/3422/files/80870218898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/pdf_file_supported_software_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/sifuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/53653904206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/jack_black_soundboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/japakobefupomowapepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/62929523802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/dovogovage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/bajosuvufokivazekofibarap.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 5128 bytes
SHA-256: 259cbff4d0cf87119030bed4822282eb3dd63442401d988f0682c28ac7e02f0c
font_01_sfnt_off00008062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 10096 bytes
SHA-256: 8e3e23766637d1acb054a025640ca3d5a0aa4a15372d1f529acc43f5314b0a97
font_02_sfnt_off0000a2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F1 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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