Malicious PDF — malware analysis report

Static analysis result for SHA-256 06831f4fafadb104…

MALICIOUS

PDF

36.2 KB Created: 2020-08-29 06:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19006fba997d91f0cc8b5ed2f08f47d6 SHA-1: ccaf8720ea49d8e23043223b6c941499e34c8b80 SHA-256: 06831f4fafadb10462948027dfc14e621e1f6ba351e39d96b9fc850cb0557780
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body also contains this URL along with numerous other URLs hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely used to redirect users to a phishing or malware distribution site.

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.ru/wix?keyword=grupo+nadadores+facturacion
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/sijifijalasupon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdf
    • https://cdn.shopify.com/s/files/1/0438/0239/4786/files/69685981707.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/81962166806.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/manual_coffee_grinder_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/imo_dangerous_goods_declaration_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/tetamed.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/22779559305.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/dujijelidogedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/17258272943.pdf
    • https://cdn.shopify.com/s/files/1/0438/2516/8544/files/4446085567.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c72a3f4c8a94c9881aa3c40433381a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_be23d90a8e484ac28f3de1816efc77e2.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_off0000442f.bin
24720cf3174bb22a86694a4511064afb6b7344fc1cfa2355ae71bd2e61249229
pdf-font-stream PDF embedded font (sfnt) at offset 0x442F 5148 bytes
font_01_sfnt_off000055c2.bin
d42b4b2482d2b14dc94ac255d16d6b5bb6f13f1a95f082a102402e998e39538e
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C2 14412 bytes