Malicious PDF — malware analysis report

Static analysis result for SHA-256 34653d04e6b04ddf…

MALICIOUS

PDF

35.8 KB Created: 2020-08-31 23:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b428f19985ae3376ee6a0ef22d20d764 SHA-1: e226a1f8679b976b046d03f3194dfc759becbc3e SHA-256: 34653d04e6b04ddfca49dc703ee43341d55e295f4c26774f5d7ce6febdad0f74
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely used for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded links, particularly the one to ttraff.ru, suggest a redirection-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.ru/wix?keyword=baby+bottle+vector+free
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/17665589030.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/92915076786.pdf
    • https://cdn.shopify.com/s/files/1/0440/8338/0376/files/lupefobo.pdf
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/92056457557.pdf
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/jimikemuwexijafajedososak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/rto_pune_auto_rickshaw_permit_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/winchester_model_290.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/98780686361.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/noraxurelagiwenetifuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/85852997189.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/xopopojoxura.pdf
    • https://cdn.shopify.com/s/files/1/0437/0120/7193/files/dobanunimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/19766386573.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/wevajo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2845/3288/files/counting_worksheets_for_grade_1.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_off00004c1b.bin
3be74c25fee1733319bf9d559ad605ccaed6a4bcf521a758a73b1d3dbfea71b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1B 5048 bytes
font_01_sfnt_off00005d66.bin
43ed62069dfb664cce3d6744d5f2d2eeb6d96e9c60ce3cf24cce0c371524472a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 11788 bytes

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