Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c12355b31d5f4b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-29 20:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea7538fe5a2a4ec14ff2babea0360867 SHA-1: d30015c86943e23ab137175a9b2b8b8da46ec53a SHA-256: a6c12355b31d5f4bb8bfc973c5a4233bb2e5b801738d1da905184cfae9f4aef5
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a PDF link farm, suggesting an attempt to manipulate search engine results or redirect users to harmful content. The primary malicious IOC is the ttraff.com URL, which is likely used for redirection.

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=five+finger+death+punch+sham+pain+do
    • https://static.usrfiles.com/ugd/b8c837_beca9e4ba94f44a2b7e5625795313e4e.pdf
    • https://static.usrfiles.com/ugd/cc10e7_33f4fe9caf244ee5b95de3df3f9ac4aa.pdf
    • https://static.usrfiles.com/ugd/d55797_ad3f633a17cd4f6889e7d6f4648e7a0a.pdf
    • https://static.usrfiles.com/ugd/e745be_715a985dedb042228d11369d69894c25.pdf
    • https://static.usrfiles.com/ugd/b8c837_df4591934a514df1b7f62f3c85e447a6.pdf
    • https://static.usrfiles.com/ugd/d775a9_9fbd62d123ff4817b09c594d7f65fbe4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f035f8eec18649eebf6ec9c77deffc04.pdf
    • https://static.usrfiles.com/ugd/b8c837_5dc447c103c64fff890dc05c86beb5ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_741273a2249342bf9de31be1a1f09d25.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1bded44bc649df9930a58778dcf501.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dd0455510ff4b888bf5f706c70c7614.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fb9aedc51804b0da9bd5ac73ec33ef4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e0d82353fcf42f18595ed52e8a2d523.pdf
    • https://static.usrfiles.com/ugd/9b33c5_10049e13f0e34ad1a47ec1e41cac6432.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_off0000684e.bin
787900c7fef9bb3d7e8436a75cd3307c9a4f9392d64af4eb860d40ccaf15dee7
pdf-font-stream PDF embedded font (sfnt) at offset 0x684E 5552 bytes
font_01_sfnt_off00007b09.bin
0cb5247e37d18a3a5e49a9eca9f155fee6faba65736e9cf3e74cdd65bf45cb4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B09 10124 bytes