Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ed10cc6d1b4253…

MALICIOUS

PDF

51.6 KB Created: 2020-07-28 22:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ca0b8ee783290feb8c68c224908321 SHA-1: 3038226586a59703654aed43b6d7acda4fbcdc59 SHA-256: d6ed10cc6d1b4253c7f84e4c8521ec07385e67786ede2427dba8e4c494dcce46
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The document body, though heavily obfuscated, suggests a lure related to financial documents. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=vanguard+emerging+markets+etf+fact+sheet', which is likely used to redirect users to further malicious content. The presence of many Shopify-hosted PDF links, some confirmed benign and others unknown, suggests an attempt to blend malicious content with seemingly legitimate resources.

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=vanguard+emerging+markets+etf+fact+sheet
    • http://files.fortwayneago.com/uploads/1/3/2/6/132695408/kekuxudajosufebu.pdf
    • http://files.lacla.us/uploads/1/3/2/6/132680874/4308009.pdf
    • http://files.leadyouhomeoriginals.com/uploads/1/3/1/3/131398574/3da0840a.pdf
    • http://files.orielesteiner.com/uploads/1/3/1/4/131438418/19ca17a305b.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/turofikivimizi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/74158849849.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/86991798657.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/rixivogo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/pekokesumapevibuvov.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/68196222865.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/kovavok.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/57849727198.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/vebilekekijuvamomum.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/kexurewinapavebefozo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/jibuzuluwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/xokuxedufasufewofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/memuwazewuremevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/futarego.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089a4.bin
f396aef70bdacb06d5017240327c9552201f86f969755b45fba242c9d8784ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A4 5204 bytes
font_01_sfnt_off00009b25.bin
1bcde0efd137ea468ebcd671ca40b98d90e80eb73f56e590c4ca0ebfbc4d3fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B25 11164 bytes

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