Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac94c56f1b711274…

MALICIOUS

PDF

34.2 KB Created: 2020-08-30 04:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1afb2f4fcd64b7a01330a6c3033878b0 SHA-1: ca682720d00bb85b7b70458a92c5e7d75e45e4ea SHA-256: ac94c56f1b7112745dfb53956d68cfc36287c8f931d1ce04b3da280b863216bf
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary links, 'https://ttraff.ru/wix?keyword=fundamental+english+grammar+fourth+e', is flagged as a malicious redirector. The document body, though heavily corrupted, contains fragments suggesting a lure related to 'Fundamental English Grammar', likely to entice clicks on the malicious link. The presence of multiple PDF links also indicates a link farm strategy.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=fundamental+english+grammar+fourth+e
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/leramesenepemera.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/3rd_job_advancement_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/48799212703.pdf
    • https://static.usrfiles.com/ugd/b8c837_e934b1eb7db94ee79e3b7e0d26bc9e27.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/wuvameluw.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/vomafitopiloju.pdf
    • https://static.usrfiles.com/ugd/07625c_b707982d9d62475ca524f4681050ccaf.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_86017adecd9a44e8b8fd815391de67be.pdf
    • https://static.usrfiles.com/ugd/6846fe_5fd49e43979347a9b5acf66edbc0a9fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e152ae9b6e3b4857980a9bbd5936e161.pdf
    • https://static.usrfiles.com/ugd/191a6d_375c02f313fd45e79f3b9962f82dda83.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_off0000475f.bin
d80edb95685424ecc7bb737d5401b2d54c436307c8fbdf1052a447078120cdfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x475F 5276 bytes
font_01_sfnt_off00005926.bin
5674c899c3ad0194a3c6b79e1a1500cfc5e8abdddddb536e03552c9f2ffcbfdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5926 10272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.