Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b91b8314315aa63…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 15:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ef1bbe58314418e57420ab868137ff SHA-1: 009610e7b316234cef60800afe87b783ead19081 SHA-256: 2b91b8314315aa635a948f9e39cad411252d3ec975523fc76884a9b3d3f52fe6
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=why+is+hellboy+rated+r+parents+guide'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many of which point to benign Shopify domains, likely used to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for this assessment.

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.com/pify?keyword=why+is+hellboy+rated+r+parents+guide
    • http://kiwobo.stjosephmissions.org/uploads/1/3/0/7/130739124/7685092.pdf
    • http://files.cosmokoroly.com/uploads/1/3/0/7/130775247/274398.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/54097131398.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/84377421318.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6317908028.pdf
    • https://cdn.shopify.com/s/files/1/0437/7460/7514/files/jurnal_skripsi_akuntansi_perpajakan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8730/6658/files/aashto_highway_safety_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9804/6621/files/2593130001.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/american_pie_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/ragulapijoxazakewuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/74098264045.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/31844688775.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/66045744865.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/42472914888.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_off000063fb.bin
6db12c52b1cbbcc8514f55571812ec3de0420e044ebe93bd48771ef800fdad80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 5476 bytes
font_01_sfnt_off00007698.bin
5305050220cd8fcfc5c6e9c76e287fafb163e8cbd465914ac9e5b21dacc67e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7698 10164 bytes

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