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)
MD5: 24959beb84a153211816361ae3a76b0f SHA-1: 233e600f2d18dd21aede8746edaaf4c9a03e9377 SHA-256: 39cf3328d724f184b15bfba2feb6494489a2671ac35bf8515fdb5032460f2a93
142 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.

Heuristics 4

  • 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.
  • 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
  • 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
    • https://static.usrfiles.com/ugd/35ddae_1b000851484044889ad898707a586f70.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5910a8b2efe4dafa99e18bd97a813a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_699892ac357241d5b7e9cd3e6467d43f.pdf
    • https://static.usrfiles.com/ugd/031dda_35a142505afa4985a4005cd202f131dc.pdf
    • https://static.usrfiles.com/ugd/1ebe14_d2a748030940456db1ac7d8b6143781c.pdf
    • https://static.usrfiles.com/ugd/6f58fb_519a36fc26ba436e8f65b2f094d601d9.pdf
    • https://static.usrfiles.com/ugd/544e7e_521cd9b5dd3543da8b292622c5f16058.pdf
    • https://static.usrfiles.com/ugd/ce14f3_e6720bc6262b4c6ab54c06dc41e4d2b2.pdf
    • https://static.usrfiles.com/ugd/544e7e_02200d11439645dab4170f166e71a8fb.pdf
    • https://static.usrfiles.com/ugd/3b0c81_6d217a7cc96648818fdbd16ab5716197.pdf
    • https://static.usrfiles.com/ugd/9f69bd_eb81355efa1d4eafb35a34f059059370.pdf
    • https://static.usrfiles.com/ugd/6da380_83640d012d324f13a5d7d17704d1ddee.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/54324361262.pdf
    • https://cdn.shopify.com/s/files/1/0462/5901/1735/files/pifubigulesemajuguzemima.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/nominuzakutikavuwip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/the_psychology_of_esports_a_systematic_literature_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

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

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