Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7c449b02ed4d03…

MALICIOUS

PDF

45.0 KB Created: 2020-08-13 02:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a0494e840d0ed28046661f16f2099e9 SHA-1: f776917c7203027a8bd23b289ccaaba1dda9d517 SHA-256: fd7c449b02ed4d030ff894201b7bcef12fa725dd9e3e92d51566527b4d923083
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifying a link to traff.ru as malicious. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm designed to attract traffic or distribute content. The document body itself is largely obfuscated but contains the URL that triggered the malicious redirector heuristic. No scripts were extracted from this sample.

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=addressing+modes+of+8085+pdf
    • http://jejudezan.gibdevelopments.com/uploads/1/3/1/0/131070357/9235194.pdf
    • http://files.keithsfishingtackle.com/uploads/1/3/1/4/131453253/7624832.pdf
    • http://files.rehabcapetown.com/uploads/1/3/1/8/131871633/1561395.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/symbolic_description_of_factorial_models_for_analysis_of_variance.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/aldehyde_ketone_and_carboxylic_acid.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/51695528768.pdf
    • https://cdn.shopify.com/s/files/1/0436/5985/3977/files/zepebelafelojemabu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/zuloguf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/wojomejuzinaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/26373366752.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/anatomic_pathology_board_review_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/vilibavefitoj.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_off00006fdb.bin
5182f3da69518f1d9f3f911017719d085970408a0fc82be2c54d1bd6bea363bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDB 5568 bytes
font_01_sfnt_off000082bd.bin
3e93182988097936f8972c047cd2f5b2f9136f50080c38780768da4aed2f4062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 11092 bytes

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