Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa958134fef228a5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 15:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25f44ce32337f837809d85fe2505ef2 SHA-1: 174402da71437e6a41293b48806506f301040a07 SHA-256: fa958134fef228a5dad82c573876d86782af762e79643bab1da877eed25c7b49
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=acrokeratosis+verruciformis+histology
    • http://files.jenkinsreidfamily.com/uploads/1/3/1/4/131437308/2b1d987a1e28a8b.pdf
    • http://kizumameb.portablemagic.org/uploads/1/3/1/3/131381241/sedediledijalikema.pdf
    • http://files.ccwills-author.com/uploads/1/3/0/8/130814169/zafebawowumaves.pdf
    • http://files.fragadeouro.com/uploads/1/3/1/3/131383921/pabil.pdf
    • http://files.supcoloradosprings.com/uploads/1/3/0/7/130740189/dusovajukox.pdf
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/digestive_system_anatomy_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0446/6514/3449/files/bbc_learning_english_grammar_challenge.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/cancer_de_colon_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/34220217778.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/xirede.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/naruvanesonosufoza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/84975471011.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/17899035419.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/29003051014.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006588.bin
8b39932f9b29bbb869f89b88752f455e7bb9444f1c08111e57286931541767a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 5512 bytes
font_01_sfnt_off00007831.bin
4ae17adf2ed5db85fd20e0670a4087259ec6355b84598a702f5a81531be3d26c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7831 10076 bytes