Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5504ef849763b0…

MALICIOUS

PDF

41.1 KB Created: 2020-08-04 19:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3dbcb9745ba44754d2d4a93916acd64 SHA-1: daddd6cc24884cb0bd0e49a536e57f91615be068 SHA-256: cb5504ef849763b077fab3fdced99dc00bc6d1399e98d483399d60b18334cc52
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 'ttraff.com'. This URL is embedded within the document body, suggesting an attempt to redirect the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=demographic+factors+affecting+consumer+behavior+pdf
    • http://files.angelasteinmann.com/uploads/1/3/2/6/132695571/mujenapejer.pdf
    • http://files.discipleforchrist.org/uploads/1/3/1/1/131163737/2059113.pdf
    • http://files.dawgstop.com/uploads/1/3/0/7/130740180/b154e.pdf
    • http://jigumo.fleischerstudios.com/uploads/1/3/1/4/131438464/silidemiguli.pdf
    • http://files.perfectlyimperfectperfectionist.com/uploads/1/3/1/8/131857114/witulufelagak_puwuzowofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/begelajitelafejuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/41459889445.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/tuwujubasizexebobelujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/30993323177.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/lurudewapanu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/cae_exams_practice_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/91406587033.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/88227639988.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/1516836780.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/97323084916.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/d_d_town_map_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/56277653865.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/mutavunemojilezubu.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_off00006135.bin
35dabb4dae18dc3c86b5ac420ba52835f487aa59c89b32ab9bdd411a895e576d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 5736 bytes
font_01_sfnt_off0000749a.bin
ea46b27e125e30eae442d82fe4ae6a4a310e4d04fa26a3ee90d0acbcb53ed4ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 10080 bytes