Malicious PDF — malware analysis report

Static analysis result for SHA-256 787a8e517c8dcbf2…

MALICIOUS

PDF

48.9 KB Created: 2020-07-29 07:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19bea381ed423ea1ace70b472f563598 SHA-1: 6588d266a4c159db524d00b18c4d683769aabf04 SHA-256: 787a8e517c8dcbf29004a45e15fa1a01a1bdc74be27e32f4fac616cf884ab91b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=coca+cola+amatil+financial+report+2015`. It also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of a callback lure indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.com/pify?keyword=coca+cola+amatil+financial+report+2015
    • http://files.trnwestchester.org/uploads/1/3/0/7/130776575/movenolonusemi-safazepe-toguju.pdf
    • http://files.eceaministries.org/uploads/1/3/0/7/130739719/4f2da7523ee06.pdf
    • http://files.tilcc.com/uploads/1/3/0/7/130738620/revexarebowiluzexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/javive.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/14072179057.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/dijat.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/62282359975.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/54137850852.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/nazawulolizutinosurikifam.pdf
    • https://cdn.shopify.com/s/files/1/0441/4429/6088/files/1477841173.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/kubejebejosexijusirid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5815/files/natala.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/wopugizujiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/jizokoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/3143804041.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_off000075b5.bin
6e90419fe46452340014c6418d76bfd81c6f5d4391d012d1c6b328d54078b7b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B5 5244 bytes
font_01_sfnt_off00008771.bin
18744cf36049bfe5ae9ef80d3a82f1a4c2f21119bfb710480f56c22328f5809b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 14936 bytes

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