Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e724c4f32e8f811…

MALICIOUS

PDF

39.3 KB Created: 2020-08-16 23:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe5a3bc40e63e39dbaae082155b35d6a SHA-1: ef5fd2758ae04f4092d1a883bc659e28aefdb320 SHA-256: 2e724c4f32e8f811da93c9a023fce916e412ef8c144630c88afb9c0992bb0203
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is disguised as a link for free fonts. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on Shopify, suggesting a coordinated effort to distribute malicious content. The primary attack vector appears to be luring users through deceptive content to a malicious redirector.

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/pify?keyword=bookman+demi+font+free
    • http://files.vanhaarendesigns.com/uploads/1/3/2/7/132740204/a070f158beb.pdf
    • http://files.tallulahsjewelry.com/uploads/1/3/0/7/130740012/1431625.pdf
    • http://files.amy-owen.com/uploads/1/3/2/6/132681901/zemitupag.pdf
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/juxutibebug.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/41039266956.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/22084845114.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3752/files/watch_the_accountant_vodlocker.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/tekefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/5078921153.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/kabagabomisifijidupive.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/9286214241.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/sql_developer_resume.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/kakupefazugikameweb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/usps_letter_address_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004796.bin
b9b84cfbfaaecd8a02597781c51409975760563faa18d21fcf6d4829d4f5ddcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4796 4956 bytes
font_01_sfnt_off0000585a.bin
b29b8520416222b7297e38cec0815dad93079eaa9435c4e4603532368fd2b9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585A 10216 bytes
font_02_sfnt_off00007b62.bin
e8051d68498e63029d7c34361d406bcd46815681d18da0e8952f0660ee027cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B62 16084 bytes

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