Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f60342fa27f173…

MALICIOUS

PDF

43.8 KB Created: 2020-07-28 17:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f756dbf80349135c84122f1fa26c71ab SHA-1: 35d9a2cf0e10b0b73d4aeb18b6e6efe183f4e6bd SHA-256: 44f60342fa27f17385fc672eea04df7050c9b12283040581a0d5b3bc7669d313
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'ttraff.ru'. Another critical heuristic identifies a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended lure.

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=allergies+list+template
    • http://files.thinkingcatholic.net/uploads/1/3/1/3/131381288/navexubijek.pdf
    • http://files.afterschoolamerica.org/uploads/1/3/0/7/130776130/077d58.pdf
    • http://files.jewishucb.com/uploads/1/3/0/8/130813799/7af2d7.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/tawakanuviso.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/212885603.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/12966977244.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/mujorewolegusatusitus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/boxoforaxowotibegef.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/44099933049.pdf
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/ropenumedifam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/72636017670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.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/
    • https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007012.bin
15a1a619d30a1bd997cfa967fc8e90806217b543ec6a0546219beefa480b1045
pdf-font-stream PDF embedded font (sfnt) at offset 0x7012 4700 bytes
font_01_sfnt_off00007ffc.bin
e0163ea14e68ca2339a19251fb7c683a103fbeb3868a81e4a29cb396473cdf89
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFC 10188 bytes