Malicious PDF — malware analysis report

Static analysis result for SHA-256 913c679bdfdbf5a3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 19:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d10efa0e9ab103f03cd445ce33dd4c7b SHA-1: 0ca99681bdee7e4ab5e62520ecbaf88db0762f61 SHA-256: 913c679bdfdbf5a3a1b8782d2829dda4d244ec97f07bb8704b549ecbb7764a20
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, also contains this malicious URL, suggesting a phishing or malware distribution lure. The presence of a link farm and redirector indicates an attempt to obscure the final destination and potentially distribute further malicious content.

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=cadaver+exquisito+pdf In PDF document text
    • http://dazudaju.shopcoresound.com/uploads/1/3/0/7/130776644/kusefuniga-rosuvudezol-todonusugitir-jetexalidomodu.pdfIn PDF document text
    • http://files.lcmcendowmentfund.org/uploads/1/3/1/4/131406060/7fd95a.pdfIn PDF document text
    • http://tufumuxe.keliadelaide.org/uploads/1/3/1/4/131454373/28ca67c398.pdfIn PDF document text
    • http://files.stephenwitkin.com/uploads/1/3/1/6/131606965/komunetinibolam_nidopek.pdfIn PDF document text
    • http://files.atablecheznous.com/uploads/1/3/1/4/131482976/d1d37b22bb2c57.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/1/0451/2422/3141/files/uninstall_mono_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3073/9106/files/92162856483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/oxygenic_photosynthetic_bacteria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/pidoruzuzedosikovuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/memobosivod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/bejazod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/19620992852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/pepesoxelotuzuwevililadad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/xupefiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/20175238388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/arthritis_uk_shoulder_pain_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/bacteria_causing_food_poisoning.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
🗂 Part of campaign: stephenwitkin.com 4 samples

Related samples 5

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 5164 bytes
SHA-256: 215eaf96ff713bbe7c0244a04f0af42b8c17ce4d9e33864b2ea5e86c659e14af
font_01_sfnt_off000076d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4 9948 bytes
SHA-256: d273434b8149fcbac9e8f72434f5840c0d7e36647229732b75c0cfdeabb2f429

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