Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da6db7cd58197e9…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 07:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3d4fed602afc327e1f00d8cf736e0f SHA-1: 1755324c3b0ccf4ae93cd311394bed13ed93ec83 SHA-256: 8da6db7cd58197e981d132d86c022d523fd7f9fb6284ba83db364c61daa4aba7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=balancing+equations+quiz+answers'. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection strategy to distribute malicious content. No scripts were extracted, but the primary attack pattern involves luring users to potentially harmful websites.

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=balancing+equations+quiz+answers
    • http://losakix.roberthillpsychologist.com/uploads/1/3/1/8/131871390/lavesedod-tazafipa-dubij.pdf
    • http://files.lynnwoodheating.com/uploads/1/3/1/8/131856446/tezume_saboti_wavek.pdf
    • http://files.admgems.net/uploads/1/3/1/6/131606111/xegajunowu.pdf
    • http://files.carlukecollies.com/uploads/1/3/1/4/131453213/07066b04c618d.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/authentic_happiness_martin_seligman.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/accounting_theory_jayne_godfrey.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/11055116687.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0438/6082/0133/files/invitation_birthday_party_free_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/72732481802.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/mathematics_content_methods_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/33287624711.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648d.bin
251806350f0b684d367c4a88c0648b0ab2662ad4790dfeaf14e7a4f2e5606562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648D 5168 bytes
font_01_sfnt_off0000763b.bin
874f969b86c2458632bb16e593d96ef3ffa12c003110ae185c2320b618169816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 10316 bytes
font_02_sfnt_off0000997b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x997B 4324 bytes

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