Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cedeb903bf11d4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 10:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 715596c9ba0d93354e18398f98d1ce29 SHA-1: f64b5c332e3788320fa9505942d2108cb7c606d7 SHA-256: c3cedeb903bf11d4f4f8fbe1c1fd9c913589a7c58971d0d34c2925be4e224790
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ethical issues of stem cell research pdf' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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/wb?keyword=ethical%20issues%20of%20stem%20cell%20research%20pdf
    • http://files.yourfinancialnanny.com/uploads/1/3/0/7/130776573/50233.pdf
    • http://files.josefurban.org/uploads/1/3/2/7/132712209/49a9fad7141a1c.pdf
    • http://files.friendsofgoodwinforest.org/uploads/1/3/1/4/131438111/pawafim.pdf
    • http://files.sheglowsartistry.com/uploads/1/3/0/7/130739060/bimapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/wegede.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/lasopirebusamez.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/pojesugulomudele.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/32391540798.pdf
    • https://cdn.shopify.com/s/files/1/0429/5547/3059/files/gajudogavisulugupus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/rapenojilijus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/wimen.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/75199348626.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/36633814808.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/12417328616.pdf
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/nissan_maxima_repair_manual.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_off00006737.bin
d523c0c9420de544ccc9b184d8d1ed4b7cdd2853ac62a7e8d13b5c5ad506c877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6737 5352 bytes
font_01_sfnt_off00007941.bin
6d6539c083f5c9b1c8a6d10a3794d61be47d7ae376c2f6381755f1e436302552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7941 10084 bytes

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