Malicious PDF — malware analysis report

Static analysis result for SHA-256 676add91484dcaad…

MALICIOUS

PDF

33.4 KB Created: 2020-08-30 04:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6daaa22a402bc23c040d9d1715a8fff6 SHA-1: 18f3a8dec594c489be20471060ccc59a20734f53 SHA-256: 676add91484dcaad62ae5a249a3729f1d4c98c5b0ff5f06de2a09441c3d00517
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.ru/wix?keyword=overwatch+hud+toggle', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting its primary purpose is to redirect users to a harmful destination. The presence of numerous other PDF links, many pointing to benign content, may be an attempt to disguise the malicious intent.

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.ru/wix?keyword=overwatch+hud+toggle
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a2c2bc_35898af8e83e4ece8caf6a0ed9b5a7bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_415bde64a0bc42d9af62f05bd185224d.pdf
    • https://static.usrfiles.com/ugd/63022f_4d2004a2b1dc41f38b7b27af97ce23f9.pdf
    • https://static.usrfiles.com/ugd/cd79e3_1bd9b1df69db4e6ca3005ffb31792641.pdf
    • https://static.usrfiles.com/ugd/67f5f7_edae88899f7a49bd99a513b5db9eee89.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/dacia_logan_manual_service.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/39161432470.pdf
    • https://cdn.shopify.com/s/files/1/0431/6433/6290/files/pofisumux.pdf
    • https://static.usrfiles.com/ugd/362633_461ec8c9716344dfb84ee9e39a0024e5.pdf
    • https://static.usrfiles.com/ugd/c8a981_1ad08aa955c24d8abc6a7cdaf9d5271d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c99193cc0183462995fb5114baa79c59.pdf
    • https://static.usrfiles.com/ugd/79cb75_bb3e54df637845fa8cd3ec141c2ada3d.pdf
    • https://static.usrfiles.com/ugd/822ecd_80137f9f0a064bb5a8e5a808e042906e.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000460d.bin
10d0a52202467395579f3d1b226a9fae2400af34734d0aaf6746b68937ca1e96
pdf-font-stream PDF embedded font (sfnt) at offset 0x460D 5200 bytes
font_01_sfnt_off000057cb.bin
f1c786f4d37a2980049d1bb88b09c1b0e600cabf05806ce625d5ce548aabe58b
pdf-font-stream PDF embedded font (sfnt) at offset 0x57CB 9796 bytes