Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b7b3608ada1700…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 23:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d97ff75e76132c97bbfdd8322c26de2 SHA-1: da8bb690ba45f8d708f8e201cd41b41bc946b0cb SHA-256: 22b7b3608ada1700be2db7561e78f8a240aa405cc78f90016a246ea12a8ffa96
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=plastic+blow+moulding+process+pdf'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content. The primary attack vector appears to be directing users to malicious infrastructure through these embedded links.

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=plastic+blow+moulding+process+pdf
    • http://divesixom.amydawsbodywork.com/uploads/1/3/0/8/130814017/5d1f75baf97.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/pujapukapitav.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/zifanedev.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/robun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/20367401042.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/83593986651.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/wekiraxuxitisuguzalosupun.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/lutheran_liturgical_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2023/8503/files/47047668383.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/9816270701.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/ralezumewisofibaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70282461387.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/29557177643.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/47627645633.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/murawonulabuza.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_off00006a21.bin
0ef6a4416d6fa74ada2cfa6e1bd648d6f0590cb7ae8784a9d07322cfbf870b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 5708 bytes
font_01_sfnt_off00007d73.bin
dbdfe1fd244ae096995f91d3eb7aef15e2c0364724902a15ff4bc6f38ec0901f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D73 10848 bytes

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