Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f93827b8070a9f…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 01:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d7b4daae1ab2592e74b219de77411a1 SHA-1: 9b2ead2619ce81104aac3714939bdc460c15c980 SHA-256: 35f93827b8070a9ffee5a05e05499253f0c810522243900347e7528f47eae78d
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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to the 'ttraff.com' URL, which is likely a phishing or malware distribution gateway.

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=happy+mass+birthday+song++naa+songs
    • http://rukavela.froumlaw.com/uploads/1/3/2/3/132303382/5e9d68bb9dd8ea.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/cours_anglais_bac_algerie.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/air_force_loc_rebuttal_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/52212440581.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/74547954755.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/watusi_ios_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/xugenokewazoturawajonufov.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/gozamiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/xinedonat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/91534240361.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/70206554180.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/oxford_dictionary_full_book.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004911.bin
d22c2da421701fa62b48214885f7b763d072b979f441e066b4aa2d22d04c391e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4911 5544 bytes
font_01_sfnt_off00005bb7.bin
eb0640e427b6f8c58d9d79ffc439e89f7cae5d5f5f69a073bbfb46c06b32674f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 4452 bytes
font_02_sfnt_off000067c4.bin
c68a2d901a8020ba13f452918913155bbb40d7cc49469a4a2835fe56bf5a19af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C4 9984 bytes
font_03_sfnt_off00008a24.bin
844cb084336e143bceaacd7de948136837ca80d958068760f33a7e0e858d23f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 16320 bytes

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