Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c6c6e9472bc13a…

MALICIOUS

PDF

38.9 KB Created: 2020-08-17 12:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cee1b873cbe7d400dcfce179c06fa08 SHA-1: 66bc38a0ff547f0a70bcc244813f7efca5948270 SHA-256: 31c6c6e9472bc13a456cc3e6cbe4d614202a0e2c2c4bc34449ef2bdee299ffc8
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.com/pify?keyword=vocabulary+flip+book+template'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, also contains the same malicious URL and several benign-looking Shopify URLs, likely part of the link farm. No scripts were extracted, but the primary attack vector appears to be social engineering through deceptive links within the PDF.

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=vocabulary+flip+book+template
    • http://gilelet.davissound.net/uploads/1/3/1/6/131607062/buguxevakaji_maxes_kawumisoj.pdf
    • http://files.fionagphotography.com/uploads/1/3/1/4/131438835/7377741.pdf
    • http://files.allykattdesigns.com/uploads/1/3/1/4/131438228/varapuxenotefiku.pdf
    • http://files.taaonline.org/uploads/1/3/0/8/130874253/xenositi_zapepaxox.pdf
    • http://files.tres-chic-bridal.com/uploads/1/3/1/3/131383444/bekefapugudug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/62870073335.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/likert-_style_questionnaire_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/messenger_170._1_android.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/sbi_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/carnivore_herbivore_omnivore_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/gegekitawizidijaraviw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/vogagip.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/mererori.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_off00005ae5.bin
91ad3c8b8901a72fec27574e20905a36ff57a601b19932b2fd0fb3cac44e1188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE5 5256 bytes
font_01_sfnt_off00006cb2.bin
b35444a56851773e21ee400ff4d260d36c71066c2657b9514763ad6117cd6b63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 10064 bytes

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