Malicious PDF — malware analysis report

Static analysis result for SHA-256 e198c1a68ed7f560…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 22:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd07513e68cc5f7df550c46ce34e57d SHA-1: ca8c7519f9b82005044b9ae66654c9031e6332b0 SHA-256: e198c1a68ed7f560ff01572b8d09be6538e74b7870627b9cc85e141365968fcd
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Pearson physics textbook pdf' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The heuristic firings confirm the presence of malicious redirector links and a link farm.

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=pearson+physics+textbook+pdf
    • https://static.usrfiles.com/ugd/6cf392_b69f656a777f4963adc7c2db1625bf75.pdf
    • https://static.usrfiles.com/ugd/7198c1_1dd867ff13c84a33a19c8ca531353526.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/secret_garden_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9349/files/85128274822.pdf
    • https://static.usrfiles.com/ugd/39cb9d_0002f0b3128b41638af5bfbb7fb8d668.pdf
    • https://static.usrfiles.com/ugd/63d3ad_5480cc9b4d1944ae8db52e7eb73e310c.pdf
    • https://static.usrfiles.com/ugd/ee4a13_e3c00a2678294013a7c1af5cbbefeee6.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/22353289854.pdf
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/metal_forming_notes.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_off00005cc2.bin
b6180766bd7231ca9e005fa695dfdbf474de947f32404b6ba6a3ae797a7983ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC2 5588 bytes
font_01_sfnt_off00006fbf.bin
ca167f71a97328157515399e4b8396460aa327d693732dd20d896ab178d6b38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10004 bytes

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