Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b101a0d461ea96…

MALICIOUS

PDF

48.3 KB Created: 2020-08-31 06:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8acd8bbf9f306b5e4250f4ecf39a319e SHA-1: 2c428573a86ecfb6ef4711bd2608bc704f5af9dc SHA-256: 27b101a0d461ea96f06f97bab7b5e527c909969205983fecae60fb75a0a5ca02
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as performance parts information. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning attempt. The presence of wkhtmltopdf in the authoring application suggests it may have been generated programmatically to host these links.

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=yaris+performance+parts
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/84818781726.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/statistical_inference_for_data_science_by_brian_caffo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/nefufegatudanetej.pdf
    • https://cdn.shopify.com/s/files/1/0463/3339/5099/files/13731587303.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/54896878193.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/63680987173.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1045/files/anniyan_video_songs_1080p_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/wonobuvadusugadaduje.pdf
    • https://static.usrfiles.com/ugd/98857b_d8f72756d0a240cfad3540def8400316.pdf
    • https://static.usrfiles.com/ugd/d54300_dd1b5a2b0ef84b7ab80402bddf56531d.pdf
    • https://static.usrfiles.com/ugd/b8c837_27e7badc137c433c9697aaf95c72375f.pdf
    • https://static.usrfiles.com/ugd/47b1e8_bb07402d648d41668e73c778aab9b38f.pdf
    • https://static.usrfiles.com/ugd/50c35f_dcd438a17a4d44ffa874f865bb622420.pdf
    • https://static.usrfiles.com/ugd/b8c837_4217c47c694f461ab008ac654aa86682.pdf
    • https://static.usrfiles.com/ugd/dad90e_ac346864c99146f9921022207a25fd43.pdf
    • https://static.usrfiles.com/ugd/b8c837_de645057731a4d4885797e5ec200911f.pdf
    • https://static.usrfiles.com/ugd/d162e3_478806545e4b41f1abfd103c0839079a.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_off00007dba.bin
d4c6e78c4074234740fcf100d85d391e46ef78fec8199b26deac60f2750d497a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBA 5088 bytes
font_01_sfnt_off00008ef1.bin
2a1a156d1223aa39d2b8c1c7cb94fa0ae100aca9b6b4dec4cd058361a6158657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF1 10944 bytes

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