Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a17dcc0f1a66dac…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 22:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7238264a7168eb71696a3d3d3ed78b12 SHA-1: de9aa93a48f607e03c79c5eded050d0bdd7f19bb SHA-256: 8a17dcc0f1a66dacbafd348f35e682bda01a6215448603f0af63eb5ef01fcf4f
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to appear as legitimate documents, but one of the primary links, 'https://ttraff.cc/pify?keyword=cells+involved+in+immune+system+pdf', is a known malicious redirector. This indicates a social engineering attempt to direct users to malicious content. The document body, though heavily obfuscated, contains references to the immune system and the malicious URL, reinforcing the lure. 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/pify?keyword=cells+involved+in+immune+system+pdf
    • http://files.thebestenglish4you.com/uploads/1/3/2/8/132815318/rudogugi.pdf
    • http://takok.healthylifecentreedinburgh.com/uploads/1/3/1/3/131379578/0bfcd5ce4a.pdf
    • http://files.kidstopinc.com/uploads/1/3/1/4/131453998/45d973b32.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/18330399517.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/boluwibunuziwexafos.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/banach_spaces_of_analytic_functions_hoffman.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/45296045061.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/jquery_validation_email_address.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/bacteriophage_proteins.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/vifovizubodedirixow.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/rusopub.pdf
    • https://cdn.shopify.com/s/files/1/0435/2956/8408/files/star_trek_episode_ranking.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/40875681914.pdf
    • https://cdn.shopify.com/s/files/1/0432/8010/5630/files/76233768899.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_off0000654b.bin
8d716750aac17f4d24a82d835597ca336beb49cc60e9c54bf2cab6e018483b20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 4948 bytes
font_01_sfnt_off00007621.bin
4184fa1b68fac123dd47885e6b87b51b25de614c3f2317b98a5a4d305bf73040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7621 9740 bytes

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