Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7f943337f03c06…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 16:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0411efeaa404a9957dedfb7eb1476af4 SHA-1: a9e3b2cab485a3c689870b062a345fb9ec6d6f42 SHA-256: ee7f943337f03c0677193fca7f83458f73e6dc51bdcf34ad66463c1bc14b65af
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=list%20of%20all%20measuring%20instruments%20pdf'. This indicates the document's primary purpose is to trick users into clicking a link that leads to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic. No scripts were extracted, but the embedded URLs and heuristics strongly suggest a phishing or redirection attack.

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.cc/wb?keyword=list%20of%20all%20measuring%20instruments%20pdf
    • http://files.colossalsportsent.com/uploads/1/3/1/3/131379111/b423519c4.pdf
    • http://wumimepa.anaestheticchecklists.com/uploads/1/3/0/8/130874431/e18a76.pdf
    • http://files.neilaquino.com/uploads/1/3/0/8/130873983/pumuk-xofasawivaluli.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/80173351919.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/pivigig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/wevokaboxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/3638622757.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/nasenot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/kolemobexakorukuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7618/9346/files/1_99_runecrafting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/mepirutorobozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/dieta_doctor_atkins_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4998/3905/files/fowosovelukoxed.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/kofidosumetufuzewabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/53345125108.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ecc.bin
6ec98ed25691ad45525c8426420a98874db9f5ecf87452f0bff7b4c85ac1838c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 5300 bytes
font_01_sfnt_off000070ba.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 1800 bytes
font_02_sfnt_off00007948.bin
f5c1fb5a615dfed9cbd79922d7f04513fb9c5f34f3da3b4fccfdc311fa6ea1d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7948 10184 bytes
font_03_sfnt_off00009c60.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C60 16164 bytes

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