Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c3a0dd058d380a…

MALICIOUS

PDF

42.7 KB Created: 2020-08-04 15:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e64650e7039844ba6c54260156fdd6a SHA-1: e8c438d7507cbc8a0e78b140ad1ed195033cbddf SHA-256: d7c3a0dd058d380a3bca6266a2584994828cfa1be07f0e92768922de234504e1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to a free textbook download, indicating a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=essentials+of+human+anatomy+and+physiology+11th+edition+pdf+free
    • http://files.kurskeducation.org/uploads/1/3/1/8/131856308/sebukazibi.pdf
    • http://files.stonyhillfarmsestore.com/uploads/1/3/2/8/132814929/fakoli_fugabapogipo_sudivazolenipoj.pdf
    • http://files.bluesense-water.com/uploads/1/3/1/6/131636601/pidaduvikebi.pdf
    • http://files.lynneeast.com/uploads/1/3/0/9/130969746/6426614.pdf
    • https://cdn.shopify.com/s/files/1/0438/1193/0274/files/sepemevugoxapixar.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/23143763904.pdf
    • https://cdn.shopify.com/s/files/1/0440/3858/6518/files/rei_s_minimap_1._10_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/gubevorukikekorufi.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/roland_ep_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/noxevemejitonogomuwinil.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2581/files/wokimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/can_you_annotate_a_in_onenote.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/in_chemical_compounds_covalent_bonds_form_when.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/76794777384.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_off0000647a.bin
78597a79098d3238928067b0c6a8b0636cb922ba575c7f69b58d4cbd2fded9e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 5568 bytes
font_01_sfnt_off00007753.bin
588aefd2bec7227a02077388df9ab23eb28943a73f0720f88516d178d1a2f4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 10560 bytes

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