Malicious PDF — malware analysis report

Static analysis result for SHA-256 794d0b77aebf652b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-20 06:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bb6edb2f2c80a54027e5c0747fa6aab SHA-1: 215fa41982303cadb211de7ec1fcaf44b9efd69c SHA-256: 794d0b77aebf652bd718e8d126bd1c34e43f621e0674d347d682d1acd984f01e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to malicious redirector infrastructure, specifically 'ttraff.com'. 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. While no scripts were extracted, the embedded links and the nature of the link farm point towards a malicious intent to redirect users to potentially harmful content.

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=motorola+one+vision+android+hilfe
    • http://files.thehudsonsheafoundation.com/uploads/1/3/0/9/130969748/zajobomoba.pdf
    • http://files.multiscalar.de/uploads/1/3/1/3/131381679/26230.pdf
    • http://wekike.choelaine.com/uploads/1/3/2/6/132682607/7190491.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/tinidexubewexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/bafovodipokog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/lowelidumuvevoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/30472905150.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/roxopigemisinugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/amplificateur_audio.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/julamisesezorukale.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/pasovisinafoliginipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/wavebota.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_off00007fd8.bin
67fbe36c7517005afd18a81feda7707b3908409480c3a89f223fd57e71423dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD8 5060 bytes
font_01_sfnt_off0000910d.bin
0bf611718f075718cbd101dfec8d59912309760958cea2e1de3e1d88de75e1b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x910D 11168 bytes