Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86e74b196339ee6…

MALICIOUS

PDF

41.2 KB Created: 2020-09-10 18:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af60790ac19a49aafc836f15c24572cf SHA-1: 1e1c492e0c1ad7ee0974a5ae1b60dd0b07f1a22f SHA-256: b86e74b196339ee687c96c586966a0fe7e65a27e876b40eb6bb686f4aa82c170
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a Canada Post tracking lure. The document body, though heavily obfuscated, contains the same malicious URL and numerous other URLs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=canada+post+international+tracking+number+format
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/isabella_vik_nude.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/dorubimagiwawerof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/gamenevanotizusonub.pdf
    • https://cdn.shopify.com/s/files/1/0468/0653/2247/files/background_check_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/6758/6213/files/cantina_band_clarinet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/5954/2176/files/povefelasezevuniseb.pdf
    • https://cdn.shopify.com/s/files/1/0463/4230/8001/files/ecers_rating_scale_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1077/files/huppermage_build_guide_wakfu.pdf
    • https://static.usrfiles.com/ugd/bdc04d_f75f88d6921449558389c3eb0dc0abfb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f1b2fc291d84aa599e22554a97cf840.pdf
    • https://static.usrfiles.com/ugd/b8c837_500b4c203a30405fa7e34697817d959c.pdf
    • https://static.usrfiles.com/ugd/f68081_f6c513d27b4643eab3358953b1f9ca29.pdf
    • https://static.usrfiles.com/ugd/9b33c5_ec9aed3269a841d8a94149f1e22e5f80.pdf
    • https://static.usrfiles.com/ugd/c722c2_d490a30f3f4f4023833bc90bc5e05917.pdf
    • https://static.usrfiles.com/ugd/6cabbb_0e43ebb4a1fb48208b4f2e18560cc840.pdf
    • https://static.usrfiles.com/ugd/4d6844_41e17394ddb943f7903f8fe446792e46.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_off00006225.bin
58afed794d9475b080ea64a74df5ac4c3ddb56043380b758c76ed2edcf4ccc44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5584 bytes
font_01_sfnt_off0000750c.bin
250b4c4ded893eb798f02b8c16d1e91fc04f3238b02b5ffdb896a796a6c79ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750C 10200 bytes

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