Malicious PDF — malware analysis report

Static analysis result for SHA-256 d675ccde3c53d0db…

MALICIOUS

PDF

42.8 KB Created: 2020-08-05 06:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0d7e03f8ecabec29d33dfb31e090149 SHA-1: 49324ddb9499150d8d4143ae80fcce58370d19c8 SHA-256: d675ccde3c53d0db9ee3bfd665edf7c9bc0e86510bdc4aa66c3acd0cf5a70e3b
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector at ttraff.ru. This suggests the document is part of a link-farming or phishing campaign designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=achilles+tendon+strengthening+pdf
    • http://files.awickededge.com.au/uploads/1/3/1/4/131454316/fagisab-tevanetumam.pdf
    • http://files.mancostrails.org/uploads/1/3/0/7/130739831/7084378.pdf
    • http://files.ajstark.net/uploads/1/3/1/0/131070712/kikurozepobijadagif.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/20032376349.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/39816635564.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/sawiriparuvapebezivotipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/firumudajidekusadopodawaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/78375625480.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/92706653482.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/56527568352.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/zajip.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/5887126479.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_off00006aa1.bin
be357e18e9f6355de4effb49b25b283f2b547b3f3f8f2eeebcce9e4ee0bfb72d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 5196 bytes
font_01_sfnt_off00007c4a.bin
49b1589999a7aff2fcbdfa780aecf5c3b274e95ca20ef5fa83fc1e935e3b9104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 10120 bytes

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