Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd42c0d9e8e3e15…

MALICIOUS

PDF

39.4 KB Created: 2020-08-15 01:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e9536678794a9b536505295575a61d2 SHA-1: 2085b7966f0803aebf391464b61fc8b42ce62d79 SHA-256: 7cd42c0d9e8e3e156ddadc1eb564d1e06f9966759ab243755a77dc04f8cb83ff
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body and embedded links suggest a lure for free movie downloads, a common tactic for distributing malware or conducting phishing. The ML classifier strongly indicated maliciousness, and the PDF structure includes a mass of external links, many pointing to Shopify, likely for SEO manipulation to increase visibility.

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=movie+taken+3+free
    • http://tudip.victoriouslivingbiblestudy.com/uploads/1/3/1/1/131164250/sotixizar.pdf
    • http://files.diagnosingdifference.com/uploads/1/3/0/8/130874102/d9979361f66.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/8491260574.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/oxford_latin_course_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/fagusomumojogilanogedogun.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/78178278006.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bewasovenajuwawofitef.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/lilaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/5926/5188/files/anghami_plus_apk_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/65977264907.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/gajanagizu.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_off00005e95.bin
588ae391ce888cad0be2ea640398927d241b98bb71527c64ff5f2a64746b29fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 4844 bytes
font_01_sfnt_off00006f38.bin
f602232fa4970a71d9ffc3d0345e1183ae4cbbb7cd60fbdc167582433d58fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 9944 bytes