Malicious PDF — malware analysis report

Static analysis result for SHA-256 f911d8460b3210d4…

MALICIOUS

PDF

37.7 KB Created: 2020-08-15 10:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8d712141917a100f3183eee324a41bd SHA-1: 3b2c73731b43830a41da2cce7dbc8a184f669b02 SHA-256: f911d8460b3210d489d27b6f245da6f99ebee2d956fe570896101647802ba247
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 'https://ttraff.cc/pify?keyword=aapse+milkar+acha+laga+lyrics'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the primary malicious URL and several other PDF links, suggesting a lure to external content.

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.cc/pify?keyword=aapse+milkar+acha+laga+lyrics
    • http://files.altitudeluxurytravel.com/uploads/1/3/0/9/130969895/545506.pdf
    • http://files.wiseowlwellnessclub.com/uploads/1/3/0/8/130813851/8d8d1173e6.pdf
    • http://vesule.blissfisher.net/uploads/1/3/1/3/131384260/rerekekulowaropuwo.pdf
    • http://files.stmatthewsbaptistchurch.com/uploads/1/3/2/6/132682681/80e49b.pdf
    • http://mugejonof.expeditionarymath.com/uploads/1/3/2/6/132681556/biwixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2762/7164/files/26208833388.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/markdown_anchor_link.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/application_for_sick_leave_in_office.pdf
    • https://cdn.shopify.com/s/files/1/0438/2641/3725/files/herculine_barbin_foucault.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/carcassi_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/20325554770.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/tafupefu.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/91348272492.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/26127243215.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_off00004e2a.bin
8f9eee3943b89b5e997a4c0b3533d4b0e84419240e30d713c9ca1e406627ce3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2A 5500 bytes
font_01_sfnt_off000060be.bin
5f355463ba1dc1b9d5481c84d29ccb022fcd90f9de3d1641eb06dafbfc97551a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 13236 bytes

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