Malicious PDF — malware analysis report

Static analysis result for SHA-256 f503d9844f7f466e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 10:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afa36a02ea7f82f9d4d5ad15b5f44e7b SHA-1: 507357353a96e0f51da6d6181e309b1ad7c64621 SHA-256: f503d9844f7f466e2840748df8cbef76f25a6232d5b136ef19bf858b02d2a875
150 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.cc/wb?keyword=specialized%20roubaix%20comp%202017%20manual'. This URL, along with other embedded links to potentially benign Shopify domains, suggests a link farm or redirection scheme designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to infer a phishing or malware distribution attempt.

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/wb?keyword=specialized%20roubaix%20comp%202017%20manual
    • http://momotabed.dxnvasupalscreation.org/uploads/1/3/1/4/131408899/5166700.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/dofepaxuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/rinnai_r85_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/waxegawab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/98747624173.pdf
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/gowuwut.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9711/files/libapukirolup.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/zusibesobotozetuvexekal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7087/4009/files/sejatifezagasowozifeli.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/95271973229.pdf
    • https://cdn.shopify.com/s/files/1/0431/9202/5249/files/probability_worksheets_grade_6.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_off00005e6a.bin
54150d0a540347c681fa2e6ecb24ec1842f98733adb056cf6d4b022c423487dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6A 5808 bytes
font_01_sfnt_off00007223.bin
5311b2e0672ab968f93e4c00b7e3c3131536d67b055fb920a36d37285355d038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 10144 bytes

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