Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e84ed380bcb4063…

MALICIOUS

PDF

32.9 KB Created: 2020-08-24 09:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2cf5f8edc98b2229603009ac72f9bb5 SHA-1: 3e455f10bc8672e36ff25e6b9770ae8d8b0cdfff SHA-256: 6e84ed380bcb4063c4e5fab882e36c2596a859c1b5b868bed374f9be724f2992
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=befikre+movie+songs++pagalworld+video'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the same redirector URL and other PDF links, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=befikre+movie+songs++pagalworld+video
    • http://files.nooracademychicago.org/uploads/1/3/1/1/131163976/7506908.pdf
    • http://wefir.deelishbydeedi.com/uploads/1/3/1/0/131070450/52b5c179e0bc14.pdf
    • http://files.salsmantour.org/uploads/1/3/1/4/131438784/rovoludaleb-pulipalewu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7936/6811/files/92087750890.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/51879467456.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/buzeduxemutugama.pdf
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/gaximamebemotisub.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/vufiwofapimeroginunosimem.pdf
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/87040654326.pdf
    • https://cdn.shopify.com/s/files/1/0446/5931/0745/files/camera_raw_photoshop_cs3_windows.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/bajegekeribeloganatip.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/universal_serial_bus_controllers_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/graphic_design_leaflet_templates.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/abdominal_ultrasound_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/din_en_iso_4762.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043a6.bin
6b7caef8077caaaeb4cafd912f8a62530ade7782f1fc411c97cc1eeb63c6c709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43A6 5628 bytes
font_01_sfnt_off000056c7.bin
ca2ee4a8a19bceeee16e393d548668206a6d6950e6ca1e611e06f0fa0ecc8e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C7 9356 bytes

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