Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a23b9df12c83c60…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 00:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd2ffa1fa4491d6684770c2f53f07c97 SHA-1: e13bc2ee1f9d7dd838cfadf9e58d36276c504bd2 SHA-256: 5a23b9df12c83c607478554369bc2ac09db81774fb05d30a14e2dfe670a48b89
140 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to shopify.com domains, likely for SEO manipulation. One critical heuristic identified a PDF link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=accounting+resume+pdf, suggesting a lure to disguise malicious activity as a resume. The presence of a callback phishing lure heuristic further supports a social engineering attack vector.

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.cc/pify?keyword=accounting+resume+pdf
    • http://darob.allsaintshighwycombe.org/uploads/1/3/0/7/130775219/127e36625862d7f.pdf
    • http://files.mayonakacats.net/uploads/1/3/0/8/130874154/3901699.pdf
    • http://dabusen.beatlesnow.com/uploads/1/3/1/4/131438464/dufotizixazi_xabasikabifiz_seneronunobirow_xawuvazawizerov.pdf
    • http://files.poochiezprojectz.com/uploads/1/3/1/4/131438025/9003910.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/5155827386.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/kemevowudokunem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/tugifitaligigevabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/lisovuvulelatun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/pumeralar.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/fipetapebotegulib.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/beatles_yesterday_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/37151487601.pdf
    • https://cdn.shopify.com/s/files/1/0440/6001/6790/files/kuxapagalat.pdf
    • https://cdn.shopify.com/s/files/1/0428/3088/9126/files/7464525554.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/97296892881.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/macintosh_error_code_36.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007870.bin
467fef8312757072b1a64c24d5bf7c8ba9a4a1158b227c61628f6c18260c8088
pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 5224 bytes
font_01_sfnt_off00008a2b.bin
fec52d75df7bb8ac9ce8b816fa6b1dd904922862d94cb5d43ca89c79caa09f74
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 11092 bytes