Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb71bef02dc5bd9…

MALICIOUS

PDF

32.6 KB Created: 2020-08-22 10:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55aa07d351128a84ee6371e9456acc85 SHA-1: d059f4b694b61bb74462c2cf2a3c6a6694ee34e7 SHA-256: 8cb71bef02dc5bd9e156c5417996523f31b0a71d5dc8520598322e66be100660
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a worksheet download. The document body and heuristics indicate a link farm strategy, likely to obscure the final malicious destination. The presence of numerous links, many hosted on Shopify, suggests an attempt to leverage legitimate platforms for hosting malicious content or for SEO manipulation to attract victims. 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.cc/pify?keyword=percentage+decrease+worksheet+tes
    • http://wixexe.trupbsc.ca/uploads/1/3/1/0/131069869/4468639.pdf
    • http://files.sumnerpaintandpanel.com/uploads/1/3/1/3/131383775/3078819.pdf
    • http://files.ecguk.com/uploads/1/3/2/7/132740502/laxoraf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/carbon_footprint_history.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/dabuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/movobefaziri.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/budget_2020_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0438/1956/5216/files/mumulotilasopamadubej.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/87653908474.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/12883512264.pdf
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/bses_online_new_connection_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/13385453649.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/unarmed_security_guard_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/ganaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/10th_class_science_question_paper.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_off000044f1.bin
f459036963005bbe16b2ff0a1dce4bd3d633ddc662c58b52919f2a5bacfc26a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F1 5324 bytes
font_01_sfnt_off00005712.bin
758d6f782c511c9c329c8f405d48013da68a562daad28b1a461500f7c1b86aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5712 8908 bytes

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