Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6cfeb6f2afed55…

MALICIOUS

PDF

34.7 KB Created: 2020-08-20 20:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c2deb50d24ac824fab8472b3180616b SHA-1: 4563a4ce09084c6f32e1495d1243a57a02e25587 SHA-256: 0e6cfeb6f2afed55fda25165a14b6a69a6f9634583fcebc8d3cd520f84089a29
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.ru'. The document body, though partially corrupted, contains the same URL and text related to 'Checkered platform vans pink', suggesting a lure. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=checkered+platform+vans+pink
    • http://files.nyqdma.org/uploads/1/3/2/7/132740435/mapaxukoluvud.pdf
    • http://files.lucytherescuedog.org/uploads/1/3/1/4/131408502/21d1d72aec262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/xutiwijelegonatatuseti.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/54216955899.pdf
    • https://cdn.shopify.com/s/files/1/0438/9063/9016/files/2007_softail_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8757/5705/files/95061589376.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/32107852724.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/jilobe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/pillars_of_eternity_review_game_informer.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/zopatewevuket.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/mevataguji.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/xusode.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_off000044cd.bin
555106dfbbe556b34dbba49eb4a849985c320eb5a5d91709f0f30ee045e2e16f
pdf-font-stream PDF embedded font (sfnt) at offset 0x44CD 5424 bytes
font_01_sfnt_off0000571a.bin
48b320142d12838a3acaa368894cd0ab2a7dafac2923981613d2e7633ad34131
pdf-font-stream PDF embedded font (sfnt) at offset 0x571A 12004 bytes