Malicious PDF — malware analysis report

Static analysis result for SHA-256 440f9b151b914f33…

MALICIOUS

PDF

34.2 KB Created: 2020-09-01 01:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 861f70fb2e468ecb2b4c856f24636918 SHA-1: 974a8f421ff3b99353b2bbfa7fb6952d78d3146d SHA-256: 440f9b151b914f33daaf877c069adb8ffb46749f9422b9ca41006d5197d5c7ca
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a query related to Equifax. The document body, though heavily obfuscated, contains the same URL. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous external links, with the first being to a Shopify domain. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

Heuristics 3

  • 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.
  • 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/wix?keyword=equifax+phone+number+for+free+credit+report
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/gusabibilopowonid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/vugad.pdf
    • https://static.usrfiles.com/ugd/b8c837_931200a67fff4940b176ef1a7a5e02f0.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/30674729357.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/muledi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/6546777676.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4048/files/98579416001.pdf
    • https://cdn.shopify.com/s/files/1/0447/7875/0101/files/aap_guidelines_for_febrile_convulsion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/91237625054.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/dororekizujem.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_off0000456c.bin
6213928372e82d28436c3e7bcba1782174afbf2f2ee47e0b0551ff0c252c589a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x456C 5476 bytes
font_01_sfnt_off000057e7.bin
f0345c25ccff2e1a23dc084fbca18e55d1ac7defca908d6a7663294d7e5ddfd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E7 10800 bytes

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