Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6bfd7c4c9b1a35…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 19:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3672f53e59e4432310b469eeafb847b6 SHA-1: aedc3edfd0e218cda2ada981951a6d54774aed5d SHA-256: 6c6bfd7c4c9b1a356239283dda0acd145c820b190ec388b6940a7b5cb12d4eca
154 Risk Score

Malware Insights

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

The PDF contains a "lock out tag out log sheet" title and numerous embedded links, many of which point to PDF files hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=lock+out+tag+out+log+sheet`. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link suggest an attempt to lead the user to malicious content, likely for phishing or malware distribution.

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=lock+out+tag+out+log+sheet
    • http://files.swgrcplanning.org/uploads/1/3/1/6/131636814/1691447.pdf
    • http://dawaxepen.diamondlightworld.net/uploads/1/3/1/4/131407408/liluxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/wasimavimodun.pdf
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/adverb_clause_of_result.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/sikam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/70851064862.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/cissp_domain_1_security_and_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/lafubakirofikavam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1364/3167/files/tebalomafapegizokazigava.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/abdomen_anatomy_mnemonics.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_off00005dd0.bin
9ec38d65082bde20f15e520c8768aa450603de491262032a7e5f87a1511abfdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 4968 bytes
font_01_sfnt_off00006eb4.bin
200b6d71340137b44305eabe3202efa485db0fb586304437e86b8eb64a162524
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 9848 bytes