Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92deb2f84c8077d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 07:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d36ee8592637dcad78ff03d9c65c284 SHA-1: 25eb0744a9ee329caae32474d82c29def718cbec SHA-256: c92deb2f84c8077d950bf996628a2aef3f69e24d2581288dca28dba762f00330
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=the+witcher%253A+enhanced+edition+direct'. This URL is presented within the document body, disguised as a link to a game download. The ML classifier also strongly flagged this PDF as malicious. The document appears to be a link farm, with many embedded URLs, likely to distribute traffic or mask the malicious destination.

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.club/wix?keyword=the+witcher%253A+enhanced+edition+direct
    • https://static.usrfiles.com/ugd/5b5da7_4bb1465a1e6548969b5ba210046a635c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f7cf313d14c4353b1e5a6a49c102a40.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f066c0bc46c47048f988b9d4575c723.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a3a734cf46e429b9e3999b0607068bf.pdf
    • https://static.usrfiles.com/ugd/1c90dc_5bf110265c8c430c8ba449e949e5d482.pdf
    • https://static.usrfiles.com/ugd/cc14e4_a5102526ce1c4562a2fc556985af5238.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ea06ee8763242819b6ad57a77c297b8.pdf
    • https://static.usrfiles.com/ugd/a298ce_a247c8e7b5d8407782dcc51f324007e9.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/wiwal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/48806817101.pdf
    • https://cdn.shopify.com/s/files/1/0465/5097/4614/files/star_wars_fatal_alliance.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/maludolorabapamafezifab.pdf
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/bemabonugogabifefumokon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.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_off00005f26.bin
76d7e261d04dc6d995ef05cc91a47c15e9e47c6fdda32b4e2e8c12de9d69831c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 4908 bytes
font_01_sfnt_off00006fd9.bin
65bbbaa0a12f6e7ae1b3b91089730a7973c557463f6bdd212ab36a7258f4b94e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD9 10084 bytes