Malicious PDF — malware analysis report

Static analysis result for SHA-256 296b9e4119373e1e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-06 18:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5000c32a2625e61c2d4d0ab36ae0c69b SHA-1: 25b6839ca02b6d780fd11533291562ea8f5f5eb1 SHA-256: 296b9e4119373e1ee6ebc5cdc057ff44a32183ffbb5a46ea466fe236bb1e57d1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=disciplinas%20de%20la%20filosofia%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to distribute malicious content or engage in SEO abuse. The document body, though partially corrupted, contains the same malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure.

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/wb?keyword=disciplinas%20de%20la%20filosofia%20pdf
    • http://files.notecbd.com/uploads/1/3/0/8/130814014/6851322.pdf
    • http://files.alphafitnessclub.com/uploads/1/3/0/7/130775983/b5ba6e95a5d3.pdf
    • http://files.aotearoaaito.com/uploads/1/3/1/8/131856398/simekut_pamufovok_jobulepuje_taxemuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/63445054129.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/junopukiro.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/calculate_probability_from_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/suwonole.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/89554802250.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/24296391065.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/cabeza_de_turco_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/waramorabex.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/87_dodge_ram.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/aldose_reductase_inhibitors.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/mijew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/gadetikokomi.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_off00005c3d.bin
8f4aa34ad5b30f06ff21a3e8dc3f1f9963fb317ce5b8f12989db8cfe537f4d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 5052 bytes
font_01_sfnt_off00006d8c.bin
4d7b5b3fe3f6ca6c1b81525685f2869fd1d0aa423d5aeb0e550e42c76b748edb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 10768 bytes

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