Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cf3328d724f184…

MALICIOUS

PDF

58.2 KB Created: 2020-09-06 09:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24959beb84a153211816361ae3a76b0f SHA-1: 233e600f2d18dd21aede8746edaaf4c9a03e9377 SHA-256: 39cf3328d724f184b15bfba2feb6494489a2671ac35bf8515fdb5032460f2a93
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.link, which is part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains the URL and suggests a lure related to a "thread dimension chart pdf". The presence of numerous external PDF links further supports the SEO link farm heuristic, indicating an attempt to drive traffic to potentially malicious sites. The callback phishing lure heuristic suggests a social engineering tactic to trick the user into calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.link/wix?keyword=thread+dimension+chart+pdf In 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://static.usrfiles.com/ugd/35ddae_1b000851484044889ad898707a586f70.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d5910a8b2efe4dafa99e18bd97a813a8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_699892ac357241d5b7e9cd3e6467d43f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/031dda_35a142505afa4985a4005cd202f131dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1ebe14_d2a748030940456db1ac7d8b6143781c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f58fb_519a36fc26ba436e8f65b2f094d601d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/544e7e_521cd9b5dd3543da8b292622c5f16058.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce14f3_e6720bc6262b4c6ab54c06dc41e4d2b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/544e7e_02200d11439645dab4170f166e71a8fb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b0c81_6d217a7cc96648818fdbd16ab5716197.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9f69bd_eb81355efa1d4eafb35a34f059059370.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6da380_83640d012d324f13a5d7d17704d1ddee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/54324361262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5901/1735/files/pifubigulesemajuguzemima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/nominuzakutikavuwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/the_psychology_of_esports_a_systematic_literature_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7316 5100 bytes
SHA-256: a26bd649103fafff58fa5de5d32eb028170b36c52c634e9c1a75175932fcdbd2
font_01_sfnt_off0000843e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843E 16192 bytes
SHA-256: 356b2b1d0ff7e08b6581bc4bc1c8a67c28f3c41de687527a23cec36e4f15b566
font_02_sfnt_off0000b77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77E 16064 bytes
SHA-256: 28c03bcf599e3456f71dbda7a9940e8017c4b7a6e15fdbd9d4eba8bfcd1a11e4
font_03_sfnt_off0000cc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC20 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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