Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e6a7f10d997e23…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 18:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40effc67d5e078b13ff5c1169e9fe31 SHA-1: 9cde99f3f13ad28e122bb135e1c6d158ab6a88da SHA-256: 22e6a7f10d997e23e2879be62691ccbea1fa22f9011dec5f6b7b3f0a06e61e58
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a keyword suggesting a lure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly flags this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=car+owners+manual+holder
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdf
    • https://cdn.shopify.com/s/files/1/0465/4704/2462/files/22347150758.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/71115761509.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/81521650621.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/31098360873.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c56e61e3b664d558c0ca432919ec428.pdf
    • https://static.usrfiles.com/ugd/c3548c_d0f1ed162dd24519a52b2f28c428ed80.pdf
    • https://static.usrfiles.com/ugd/b8c837_735c6288f6dc435e9ebd8326560b260d.pdf
    • https://static.usrfiles.com/ugd/067ecb_a0254e052d6e4c5888adbad94f904774.pdf
    • https://static.usrfiles.com/ugd/b8c837_544014e9aa8249bf9bfc242ca136413b.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/riberis.pdf
    • https://cdn.shopify.com/s/files/1/0447/0836/4444/files/clerks_private_sector_award.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/evacuation_drill_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/jabitulubujanenumul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c01.bin
55848b406914d4b5c8f262091888c5530f8830163f229a964ca79de108a0362e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C01 4932 bytes
font_01_sfnt_off00006c9a.bin
48d6e7a5ea0fd62d653909e0f5d3e2672d54027500294af1908187a64f91683d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9A 10872 bytes
font_02_sfnt_off000091e6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E6 4324 bytes

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