Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e92bf812afb4e89…

MALICIOUS

PDF

37.1 KB Created: 2020-08-01 08:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cea4a762f79085c8a1d56d758649ad4 SHA-1: 2bd243f3c6baa4780b2610104a1c04346a9b924c SHA-256: 5e92bf812afb4e8985cee5ea85379be8fbf88383a3e5f3eeb67e6e219f2869ba
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, 'https://ttraff.cc/pify?keyword=life+in+mono', which is designed to lead users to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms the intent to redirect users.

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.cc/pify?keyword=life+in+mono
    • http://files.aheartfortheharvest.com/uploads/1/3/1/0/131070351/potixe.pdf
    • http://files.themohicans.net/uploads/1/3/2/6/132683267/baruxebugel.pdf
    • http://files.williamsremodeling.com/uploads/1/3/1/8/131856146/lufeteda.pdf
    • http://files.mrsnow.org/uploads/1/3/1/8/131856919/xokofobuzesavo-jawagi-rudanami-vesajuzigerorid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/sigagotigijedewapevegit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/golegasapekedovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/xoporizuxotudesipoxirurus.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/98489400513.pdf
    • https://cdn.shopify.com/s/files/1/0429/4836/2399/files/32402044212.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0520/files/46704329969.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/32673388495.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/kabusit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/24164702848.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/92498319229.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_off0000575a.bin
e5f25a2baf348825504b1a19a4b0a03e89adfc469d9d424f056d9fb660606cd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x575A 4340 bytes
font_01_sfnt_off00006614.bin
3d5021c3a767d96593872a4a370ac50914072d9e3b5340858a5fcffd4b6a1b55
pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 9892 bytes