Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3916a0d6d0c786…

MALICIOUS

PDF

37.4 KB Created: 2020-09-03 09:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ae9825514aad57114cd3bfa252633c SHA-1: 069474bd129fdb9d4b489d728fa9da9f5b8ce826 SHA-256: 3c3916a0d6d0c78656fb6da7cac20b220a9372dfbb86bfea397b2343033f5dbb
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=mediaf%25C4%25B1re+free++music'. This URL is presented within the document body, disguised as a free music download. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The combination of the malicious redirector and the deceptive content suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=mediaf%25C4%25B1re+free++music
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/mopijoxidatuvuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/bupofinaxezizemuvine.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/lozedunulup.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/17812301239.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/electrical_circuits_ks2_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/diwijoxow.pdf
    • https://static.usrfiles.com/ugd/6da380_60966c4f364841fda9d9d26798c72274.pdf
    • https://static.usrfiles.com/ugd/b8c837_791fd0c048c3440aaea525b831fe53db.pdf
    • https://static.usrfiles.com/ugd/26938b_504e5236c42744658b62340fe3ecaa53.pdf
    • https://static.usrfiles.com/ugd/fa6f14_dcad50d5aa0949ee91ff517c8a3c3933.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/celebrity_millennium_deck_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0202/files/pimidokemupiso.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/vupap.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/fifokureveto.pdf
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/39736590658.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_off00005247.bin
086efed008505bbe41f735a8bb0c34d64033aebfc8c127881c4f3c701728f3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5247 5172 bytes
font_01_sfnt_off000063de.bin
851bacc7883c1c51b579019c21940c219ee008757d46a4de31550c7f380caa68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 10452 bytes

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