Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eee792e73ca29d1…

MALICIOUS

PDF

38.9 KB Created: 2020-08-21 20:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f265bcf8f54d3d536e1f1f0aca4ad76 SHA-1: 75b00696128eb5ecd4ad6ed9681102b617b19d83 SHA-256: 3eee792e73ca29d1e21574b39c3f86ae10291de12ffd2369c65001d15322ef0f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=carfax+report+uk'. This URL is presented within the document body, disguised as a 'Carfax report uk'. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDF files, many hosted on Shopify. The primary malicious URL is the most critical IOC, as it serves as the initial entry point for the attack chain.

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=carfax+report+uk
    • http://nanokife.saradeckard.com/uploads/1/3/1/6/131637419/gariwin.pdf
    • http://files.inspirepacohio.com/uploads/1/3/1/3/131383330/nepunugozaribebe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9711/files/accidente_cerebrovascular_2020_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0448/2118/4674/files/fractions_addition_and_subtraction_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0459/9663/8365/files/fibudosigolijili.pdf
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/8441673180.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/betternet_premium_ios.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/nefarubuputonom.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/77877613261.pdf
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/disunegubafivowoboxevaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/61948015346.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/kill_process_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/interior_angles_of_a_triangle_worksheet_doc.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/powevaligerodirikep.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_off00005d1a.bin
b4bf7a72dab346d5617f91015fd603b23615ea4075bb6442f76f3d495c0df90e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1A 4720 bytes
font_01_sfnt_off00006d44.bin
378e3dae69aa753072bc34ca9b049dfa1b8b2d8cbbc595a8f2815cb5853b15c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D44 9968 bytes

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