Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d190bc76ec0187…

MALICIOUS

PDF

62.8 KB Created: 2020-08-12 17:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6393861f6f5e7bf9c30da726155a113f SHA-1: 3bb1435f549b41e21c47f72b919a75a5092c9ccf SHA-256: 89d190bc76ec0187d7f4c2a21eaa2ecaa9518d4435b6ef8dfee246e7b40e6d99
128 Risk Score

Malware Insights

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

The PDF file contains a lure related to invoices and payments, directing users to click on a link. This link, 'https://ttraff.ru/wb?keyword=bookkeeping%20and%20accounts%20for%20beginners%20pdf', is identified as a malicious redirector. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or distribution. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=bookkeeping%20and%20accounts%20for%20beginners%20pdf
    • http://files.suzannewittfoley.com/uploads/1/3/0/7/130739069/6a61479a4.pdf
    • http://xuloda.vancouvermermaid.ca/uploads/1/3/2/6/132681504/1605792.pdf
    • http://mosofu.litchfieldmobilevet.com/uploads/1/3/1/6/131637016/7fca2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/69453093866.pdf
    • https://cdn.shopify.com/s/files/1/0434/7618/9346/files/gavupejegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/85527211136.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/kiwufugidozilege.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/nexelusifapuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/fapojafotopumanokufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7286/files/automotive_technology_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/mepiganupire.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/rifuvadegam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/zufamugibagokawijam.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9873/files/peripheral_smear_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0429/8407/9523/files/40498367582.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/juzisupebujakawuvanisag.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_off0000b7ca.bin
3e562b4b8e834a6a7ee3d6d513d48a819b14fc60b7734609fee123a7575547fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CA 5544 bytes
font_01_sfnt_off0000cab1.bin
218cbecb08b0df4b9524a920c4ebfd1b857f2bca4ea1e4a1a0d8096afbb62552
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 10248 bytes