Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c06a0c22aaf207d…

MALICIOUS

PDF

57.7 KB Created: 2020-08-17 10:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bf72b0d91989f69915fccb4f5e672f9 SHA-1: b1a220e692990602734a24e4bee73c4ff9ebb823 SHA-256: 6c06a0c22aaf207d7e1b207ac07dbfc1f458e834865fab07a1ce402460cdd8e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document also functions as a link farm, containing numerous external links, many of which point to Shopify domains hosting other PDFs. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious campaign, likely a phishing or scam attempt.

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.com/pify?keyword=bleacher+report+2012+nfl+draft+grades
    • http://files.drfelixroom26.com/uploads/1/3/1/4/131453543/minubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/kulakakigudebixi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/quadratic_equation_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/byzantine_church_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/8579454736.pdf
    • https://cdn.shopify.com/s/files/1/0448/9101/3275/files/kalnirnay_calendar_september_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/turibuxuzijigapinewak.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/75732970681.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/47858401847.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/rinewo.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_off0000a232.bin
d9282c6c89371de659ab9abfc84c3e55b9e8484d7b51a0507512f0d2eca1a268
pdf-font-stream PDF embedded font (sfnt) at offset 0xA232 5792 bytes
font_01_sfnt_off0000b5e9.bin
5f627b4967e8955c7db50bf8c6b06ce1dbbb6c1cd75ce540d260e57bc67d8fc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E9 11272 bytes