Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a58419e0dec0bc…

MALICIOUS

PDF

42.8 KB Created: 2020-09-01 08:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba915224a40feab3916661b981e6aab7 SHA-1: 5ca71c396583275d33074557a6b1e9ec21247e63 SHA-256: d2a58419e0dec0bc50f844bacb71e9daa3931d70e03a1c2a479029af10d31331
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 'https://ttraff.ru/pify?keyword=cabinet+battle%2523+1+live+performance'. Additionally, another critical heuristic indicates a PDF link farm with numerous external links, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL.

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.ru/pify?keyword=cabinet+battle%2523+1+live+performance
    • https://static.usrfiles.com/ugd/a64c8c_5f22b4de4b824ceba48dfa228909bbb1.pdf
    • https://static.usrfiles.com/ugd/362633_dd444dbdd5ee44b885a0e66b815b4f8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7453fe166aa421cb9a6576793c7d090.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b231896a887490987498121089e78c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5469130d7b3d465a8025e6789ee5f130.pdf
    • https://static.usrfiles.com/ugd/0a052f_3d3fb509654742508df125b0bcf73c8f.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/best_paid_android_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/surug.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/8569376026.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/6082696457.pdf
    • https://static.usrfiles.com/ugd/67f5f7_a6ee062c6f7847c19f2d91924e6a5e1b.pdf
    • https://static.usrfiles.com/ugd/f84671_4b8c455b501c4ac2ba3325c6289649aa.pdf
    • https://static.usrfiles.com/ugd/078c79_37430ecfdd654c3b85a2b35366080dfb.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/
    • https://static.usrfiles.com/ugd/67f5f7_a6ee062c6f7847c19f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b69.bin
5f2774a8c7369fe7396d11b8bff7248bf7b12860ca82ceea26165a0e0a5d04db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 4452 bytes
font_01_sfnt_off00007a9a.bin
56fe71a02befb7064223cf8c0c6cbd9a0c5eb9346e90191eda6ff41fc860854f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 10692 bytes

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