Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efd7185987998f1…

MALICIOUS

PDF

45.9 KB Created: 2020-07-31 12:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f3151e9a2759f5abda9658b05c28f03 SHA-1: cc9b76486f01b4678990593a7d92423076c48287 SHA-256: 0efd7185987998f1e9d51a3371078feb1e31560b9eff7f0febb2768c378a38e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm designed to host other PDFs. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for 'outdoor table plans pdf'. No scripts were extracted, but the presence of many links suggests an attempt to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=outdoor+table+plans+pdf
    • http://files.fredericktownfire.com/uploads/1/3/1/4/131409498/wuwaxoxave.pdf
    • http://files.coastalk9c.com/uploads/1/3/0/7/130775223/3452802.pdf
    • http://files.pasaliphilippines.org/uploads/1/3/0/7/130739204/f0bcfd5aa.pdf
    • http://files.antoniacundy.com/uploads/1/3/1/3/131383424/doteloxom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/jofafugadege.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/93071069994.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/60708562680.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/75553715215.pdf
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/sajutibixix.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/26062745447.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/puneruxosazowofafoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/kabepawinufuxipugupas.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/zobofofifuzasawosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/58030379204.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/62780836327.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/70588364207.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a8.bin
782dfe9474bb478d013ef61ec29a9eb0e71242959cf5ba4f31187b7fa1d550b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 5036 bytes
font_01_sfnt_off000087c9.bin
b45b700efd9c8ddbebad8177e21d30b2d737478429e4184eb7ed612930fd5368
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 10176 bytes