Malicious PDF — malware analysis report

Static analysis result for SHA-256 f787371311c1e8dd…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 01:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0676d2024a22390fa0693a888dbff7 SHA-1: caba5a19ce0162006862cc35f00b4937b46a4709 SHA-256: f787371311c1e8dd5b35d7a171fa01f561afea2c8968287864ceb1c80b1813b3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=best+strength+training+for+arm+wrest'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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/wix?keyword=best+strength+training+for+arm+wrest
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/36361251949.pdf
    • https://cdn.shopify.com/s/files/1/0429/7572/3673/files/download_pokemon_resolute.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/mathematical_method_for_physics_by_g_arfken.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0787/files/7467957320.pdf
    • https://static.usrfiles.com/ugd/06497e_b2538a93c6d54094a026dae5be20896f.pdf
    • https://static.usrfiles.com/ugd/d54300_50a55ac2f76d46e5a12db368652a0eeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5224/files/62151931046.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/dikivudivewurepani.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/how_to_check_android_version_logo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3950/files/86350593757.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/cabalistic_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/55977912053.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/29431216125.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d20.bin
ac776d9707ed01f3878a70e8407babb91f6ff874dd9a6423b3d8a94acd4950d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D20 5292 bytes
font_01_sfnt_off00006f04.bin
cb5b08134bb5e2d727c0579213b5462bf5e3f681ba1b88c84aa6dbf5e11e9158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F04 10032 bytes

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