Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16bb717a303d352…

MALICIOUS

PDF

58.4 KB Created: 2020-08-11 16:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b674747f1da06b6f9d81530c364627a SHA-1: 2cd090712f34880a0a110000ef6d9cc066deb2ad SHA-256: a16bb717a303d35223ebd31ee349b54f75fab2b52d8a54e94bbb5b771bbfe059
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign-looking documents hosted on Shopify. However, one critical heuristic firing indicates a link to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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=teoria+da+argumenta%25C3%25A7%25C3%25A3o+jur%25C3%25ADdica+pdf
    • http://files.madebyiv.com/uploads/1/3/0/8/130874009/safamugesol-sipalukomafeg-wogemuw.pdf
    • http://files.enriquemanchon.com/uploads/1/3/2/3/132302960/1822826.pdf
    • http://rekatare.mayadayal.com/uploads/1/3/1/0/131070493/b9a9192.pdf
    • http://files.activealuminium.com/uploads/1/3/0/7/130739084/miguxot-fegelofup.pdf
    • http://fasixudi.tastefulvoyages.com/uploads/1/3/0/9/130968921/rekefapebel_folivejarikomoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/revista_chasqui.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/journal_of_apicultural_research.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/dogofutufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/creative_director_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/first_500_digits_of_pi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/calculus_problems_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/73429285691.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/22038376514.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/causality_assessment_of_adr.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/patufidigox.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_off0000a1c6.bin
c8b59f76cebd0db61547d640ae04ddbe1101a21b87a449ac7fa1ae089cf281ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C6 5844 bytes
font_01_sfnt_off0000b4c5.bin
eaf9642591e3d6bd5930fe6659e51bdee522bb3b587e3c0e83b272ce67baf216		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C5 12760 bytes

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