Malicious PDF — malware analysis report

Static analysis result for SHA-256 390d9f103ac7c74b…

MALICIOUS

PDF

37.2 KB Created: 2020-08-08 23:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b57254e839cc5929e8c7b9651cb7b91b SHA-1: b0aedf1b7cb94689bc57f0ba3ad8bba464516a44 SHA-256: 390d9f103ac7c74b27ece27fa9e8bc07f6c4c4e0c37a0a3dbdfa2857ab909998
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'filemaker pro tutorial pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.ru/pify?keyword=filemaker+pro+tutorial+pdf
    • http://files.designsoncraft.co.uk/uploads/1/3/0/8/130813330/vopuwasakemen.pdf
    • http://fabiba.teachinghooks.com/uploads/1/3/0/8/130814297/karijupenumuf.pdf
    • http://files.livvybeaus.co.uk/uploads/1/3/1/4/131408954/8892104.pdf
    • http://files.creeksidepto.com/uploads/1/3/1/3/131380292/bddd4a0a7731ad.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/81612604155.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/30509607206.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/autismo_leve_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/32431417821.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5625/files/persona_q_rom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6449/1174/files/fogitaxupowowigekuvatijiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/les_armatures_pour_bton_arm.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/98412004290.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/pivamebodurewofamozax.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/69806398278.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/55833013310.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_off000054fd.bin
53f790400e0b9626b6896baf3eb86bb3353ffe06ede108248d09e6fa522d5cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54FD 5028 bytes
font_01_sfnt_off00006603.bin
2547e2d17353da488cc0c3cb2b667fdb937d6686a345542fff289835064f26c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 10056 bytes

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