Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d39e21b4f207aa3…

MALICIOUS

PDF

38.0 KB Created: 2020-08-24 01:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 591f90aa1237cc7b14886252b01c6c2d SHA-1: 46531f0f596bd8e7ff8f87d1b2472ce9f35fe360 SHA-256: 8d39e21b4f207aa3a43be67d0f8306e1fe298162bd300ea2068f746b0a4f1058
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=feasibility+study+template+excel+free'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. The file type and the nature of the lure suggest a phishing or scam attempt.

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.cc/pify?keyword=feasibility+study+template+excel+free
    • http://vuvur.missingpersonsrv.com/uploads/1/3/2/3/132303354/598715.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/11303760809.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/it-_ebooks._info.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/40049395327.pdf
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/sorikepovorozejibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0732/7904/files/minecraft_guns_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/51924903893.pdf
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/bewawesaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/ccna_cisco_certified_network_associate_study_guide_richard_deal.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_off000055ee.bin
2d3d0b42874b1e3941ca637a7f083929451f6c376d7abb009f27a14428a64f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EE 5568 bytes
font_01_sfnt_off000068c6.bin
3159f558c4ea54d87482cbc8e2b3c89709725ffd7cc9fd0f63b1e012de6d2d84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C6 10228 bytes

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