Malicious PDF — malware analysis report

Static analysis result for SHA-256 557fb2a47054a416…

MALICIOUS

PDF

37.0 KB Created: 2020-08-06 19:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2ecd5cc6cf1d228b1116d50aa7994e0 SHA-1: 4e99efad2a640b78117e6be769e751ae230fa8b4 SHA-256: 557fb2a47054a416b1aa56f4335f022f5327c435ebf4f8c0d028ed38fe6cddde
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 pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting users to malicious infrastructure.

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.com/pify?keyword=azar+intermediate+grammar+pdf
    • http://files.amanapopcornandicecream.com/uploads/1/3/1/8/131856158/b68997ed371.pdf
    • http://levivenu.pcasra.com/uploads/1/3/1/3/131398560/6fcf4ca5d641f.pdf
    • http://kagerogop.boneheadglass.com/uploads/1/3/0/7/130775350/manezenukebuwuw_sojosik_xamajexexulu.pdf
    • http://files.100blackmenofsanantonio.org/uploads/1/3/0/9/130969700/c3aa49a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/vabipuzuzotovabikujeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/vuxibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/pivujezajotalatadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/vaketimodojez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/emt_b_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/josuluvobarezamijapatubuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/39608405133.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/lozuxiguzixuzumekusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/editing_etc_hosts.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/muscle_gain_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/xajamadasaled.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/canzoniere_petrarca_riassunto.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_off00005336.bin
d78e9655f2a4d5673ba85aae5934ccc94131aa243789540e40381b1306d6325a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5336 5192 bytes
font_01_sfnt_off000064d8.bin
af170f804778658a6eb6f2b7ecc2e64eb9ac47181e1d73e3aafe651b86a0f3be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D8 10088 bytes

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