Malicious PDF — malware analysis report

Static analysis result for SHA-256 4769ade529f0a7bf…

MALICIOUS

PDF

39.8 KB Created: 2020-08-10 06:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b5b6bc1967e816176af648a5312143 SHA-1: f8c3cc42797109f7bb339348715b552bf2535cf6 SHA-256: 4769ade529f0a7bf9fb59396c3595b8be91495e57032f3dfa9223c713e3cc1a3
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains the string 'technical drawing pdf textbook' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=technical+drawing+pdf+textbook
    • http://files.ginnyshockley.com/uploads/1/3/1/8/131856247/muvibulado_xasigimibovuv.pdf
    • http://files.nickidenicki.com/uploads/1/3/1/4/131454521/kebol-wakojoje.pdf
    • http://files.oligumm.com/uploads/1/3/1/6/131606206/264ed82a5d0.pdf
    • http://files.lostinthecrowdbook.co.uk/uploads/1/3/1/6/131637402/fiselisuzaro_susivimif_pamijozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0643/files/39278387047.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/vodoxipam.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/bass_guitar_notation.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/gabubulomofera.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/32204292449.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/supup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/siseta.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/xokufoxafimuwivipokor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ded.bin
870995714878474b0157363771ff5487b68917d5da6e2b8cdfe48186c7f12045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DED 5340 bytes
font_01_sfnt_off00006012.bin
a74ced808aebb5b44cf78ede38ed5c66701e860b1ce75dae7bd64709e6137e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 10796 bytes
font_02_sfnt_off0000849d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849D 4324 bytes

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