Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfa6aef168daf7a…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 17:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37320443801f1dbc70c1a34e41e379f4 SHA-1: de129df008a0e2b2664f00b941122d8576889054 SHA-256: dcfa6aef168daf7ae78399074792943a78f8f45baf53a3a64d7f57ea9ab72dc5
152 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. The primary attack vector appears to be social engineering through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=blood+of+the+highborne+pdf
    • https://static.usrfiles.com/ugd/b8c837_1d857966b17f415e9e175e82239d8f4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_33906e7b17164d1da9613f6d42afb0ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8991a978f024afbb5ba4dd873c02fef.pdf
    • https://static.usrfiles.com/ugd/b8c837_d098e4fd11204f8c9526e8a3bd5f751b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e1947b7e04447b99c3da2920385052d.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c4e1483542468bb670d192ab0e152f.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/15198886671.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/wow_wow_wubbzy_porn.pdf
    • https://static.usrfiles.com/ugd/b8c837_efc6fe953ec6424396a962789aae88c5.pdf
    • https://static.usrfiles.com/ugd/18f527_749d887976894dd7a30276455c7c53a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b6e61671bf14258ab38b24dae5e0cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_23bd4eca5d9745bfbff6a7d67b9b17e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e88968d59744da3964ca22d0488171b.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_off00005ca6.bin
94c2dfbe22cc13cc7846c5e0c384073955c17b159298873fc3baaace44715562
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA6 5104 bytes
font_01_sfnt_off00006dfb.bin
7404188c07c3ddedcf41c5af3cc4ac4a911cdcc8c0890824a5b35f08160f9342
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFB 10672 bytes