Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a73089188304ad…

MALICIOUS

PDF

79.8 KB Created: 2020-08-09 03:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f444126edb9e64b6734066c9a571542 SHA-1: 7a2488b65a80f73fc97afac278a553d1636c8dec SHA-256: c1a73089188304ad6d6e9280d36a8ef28a598813cad49c7688b3ebd531c10be7
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one that redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains the text 'Portfolio assessment rubric pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm and a malicious redirector indicates a phishing or redirection attack.

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/pify?keyword=portfolio+assessment+rubric+pdf
    • http://files.judyatraveny.com/uploads/1/3/1/3/131379117/60328f8854.pdf
    • http://files.marrickme.com/uploads/1/3/1/3/131398432/b56fb000f3abd8.pdf
    • http://files.mail.complexity-aesthetics.com/uploads/1/3/2/6/132682826/3559598.pdf
    • http://files.signshares.com/uploads/1/3/2/7/132712530/wokedugemofen_remivirijozas_purilazevexaxon.pdf
    • http://files.180degreefinancialcoaching.com/uploads/1/3/0/9/130969744/d6ced7.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/gomunetodedoxozogin.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/english_grammar_for_kids.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/discord_chat_color.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/preorder_traversal_iterative.pdf
    • https://cdn.shopify.com/s/files/1/0437/1067/7141/files/oracle_unlock_user_account.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0944/files/how_to_add_a_label_in_pygame.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6993/files/ginadijobikadibagira.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/amarakosha_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/17014833392.pdf
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/18804073022.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/favubedezemopazejive.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/83374176596.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_off0000fb7c.bin
ef56019f36e6cb284d42131d38ed292d377adcb72b7e18427a24f1e09e46dc54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 5444 bytes
font_01_sfnt_off00010de0.bin
3166b84855f3050f1d7aaf0f598f4e19579a6151eab29ed81c0cfc8a082004bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 10456 bytes

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