Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f518de1cf364b44…

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 21:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f4ff368a9fcb52358a53e88e3b5fe44 SHA-1: cbc6110ff9859be1d7a60d5323d3217ed46f5f9b SHA-256: 8f518de1cf364b44249497d1b6c335bdd57591d80588f5e63a97a564b1cbef96
92 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.cc, which is highly indicative of a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for this assessment.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=regular+show+episode+a+bunch+of+baby+ducks
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/zajegetevonilirowego.pdf
    • https://cdn.shopify.com/s/files/1/0452/4307/2674/files/hoziana_by_ambassadors_of_christ_choir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/dakaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/bastarda_istanbulului.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/86928835101.pdf
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/jibaworifubobe.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_fef6abb01bb6449f9452a19d6dae0a93.pdf
    • https://static.usrfiles.com/ugd/b7082a_9979be4eb1464c10806b914b6bc06089.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_off00005df0.bin
dbbf0e84054e68eed1d743466518f85465da17b11830ad26a48dfb69b1bfbb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 5624 bytes
font_01_sfnt_off00007120.bin
93e90beb7d32fe99ecd80ae0ce64ca38116c84c9e75668560013bf1ac2faf5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 10088 bytes
font_02_sfnt_off00009397.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9397 4324 bytes

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