Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bca1a306d561f1…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 12:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a0515784f6388ee4bfb489f038d53e5 SHA-1: ff7e43d94424f1a356cd7011aa92023980831616 SHA-256: 83bca1a306d561f1caecb527c004acd4e7ab2067f18b74ba79b41ef25aa99ec2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'piano sheet music', suggesting a lure. The PDF also exhibits characteristics of a link farm, with many embedded URLs pointing to external resources, likely to improve search engine ranking for malicious content.

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=flaws+bastille+piano+sheet+music
    • http://files.estellegourmet.com/uploads/1/3/2/8/132815748/4c5d492e7.pdf
    • http://files.egyptianreiki.com/uploads/1/3/0/7/130740624/waruw_sixovenesup_fewifirigupo_vafabu.pdf
    • http://pefazul.minxiejewelry.com/uploads/1/3/2/6/132695829/virunapederawux-ximiwizuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/4141/3527/files/48849660396.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8412/files/61927911767.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/94086702970.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/potozebibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/cinderella_solution_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/23700538912.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/wonadirolavibisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/free_formal_letter_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0450/8644/1637/files/90666670775.pdf
    • https://cdn.shopify.com/s/files/1/0462/5255/6437/files/gush_etf_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0441/1532/9176/files/extend_photoshop_trial_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f62.bin
f60d8e9e0b9e87b1df1a9ece84656decb87d8c423be7d694f7ff94bcbfb9602f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F62 5264 bytes
font_01_sfnt_off0000612c.bin
77054d383db95ab706754b2c7c1ebf5ded777122d8f03f914287b822081170d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 10592 bytes
font_02_sfnt_off000085af.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 16120 bytes

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