Malicious PDF — malware analysis report

Static analysis result for SHA-256 a687991ae9494189…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 02:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce3f5b5f1985129dca8ab4ffa69edf0 SHA-1: c61da5ce3a8b86ddfd89de2a1f81ae17de59fbdc SHA-256: a687991ae9494189c96730a04c686022c4029f26047d4d991b30712b0c2815f1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=accessory+organs+of+digestive+system+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to drive traffic to this malicious redirector.

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/pify?keyword=accessory+organs+of+digestive+system+pdf
    • http://files.bernardramsdale.com/uploads/1/3/0/7/130740429/detanikolisesomomak.pdf
    • http://files.cmc-tam.org/uploads/1/3/2/6/132695525/4516092.pdf
    • http://files.aiswn.org/uploads/1/3/1/1/131163599/topopunagi_romab.pdf
    • http://pogifuzid.nakedtrackdays.net/uploads/1/3/0/7/130775403/divusufopan.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/64880425429.pdf
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/13617251961.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/vukupowelemumurazojita.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/63249329609.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/anne_frank_biography.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/search_only_for_files_on_google.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/59004223879.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/ccna_200_125_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3159/files/78195824822.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_off00006cb6.bin
bbbb663cdd7d32957a45e7e09ced0518c54e95c7af3baa3c11cd5b7e3f26c8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB6 5592 bytes
font_01_sfnt_off00007fbd.bin
38ad235a027eea4344be49af713afafd8774572790412ce8b10fefc806e36d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBD 10236 bytes

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