Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed73702c0222f0ca…

MALICIOUS

PDF

35.9 KB Created: 2020-08-30 00:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da2480348350a885d4d86125b8d9de75 SHA-1: dfdf41155c8904d89e31da08b81f1bc255e8602e SHA-256: ed73702c0222f0cacc83142efd3ea96fa3e5e6e2522ea74a3ef4cdaedfb01cc8
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/wix?keyword=fallout+4+vault+dweller%2527s+survival+guide+download'. This suggests the document is designed to trick users into visiting malicious sites under the guise of providing a game guide. The ML classifier strongly supports the malicious verdict.

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.cc/wix?keyword=fallout+4+vault+dweller%2527s+survival+guide+download
    • https://static.usrfiles.com/ugd/2ac701_515153d72caa46d0972caadb510fcaa8.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_2b071f939c9e445b9d779ab011980ba1.pdf
    • https://static.usrfiles.com/ugd/516793_8efd2e67efb946f097eee700668000bf.pdf
    • https://static.usrfiles.com/ugd/4bb894_c010c527da8841299dca3236861b6df8.pdf
    • https://static.usrfiles.com/ugd/09c3c7_ce6ef0ecf2884c07a9c82b8005fc1b50.pdf
    • https://static.usrfiles.com/ugd/9f6a24_2c1ab77fa2934150947aa8745bad24d0.pdf
    • https://static.usrfiles.com/ugd/93c935_ecc7c57a4a624beea43259b44e4d2b27.pdf
    • https://static.usrfiles.com/ugd/b8c837_f139695ee2484889a870e9f9d6725a17.pdf
    • https://static.usrfiles.com/ugd/b8c837_15a4f5a93a2748b7bd9503e57016333a.pdf
    • https://static.usrfiles.com/ugd/34e21e_30425a1d23d34305a9f034f0af7873aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f7f3190808d45b599d585a6502508f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a88913aca34a46ac801ddf5c6929cbb0.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_off00004d02.bin
79c45080aeab68ea8d38e8bfbfad848f5009d3a974b79b49b5d05605aff7f749
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D02 5224 bytes
font_01_sfnt_off00005ef7.bin
33315d162a703f07fc3509d349fdfa9f3d2f331c0e43531d2ccfc21e7421bc25
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 10424 bytes