Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea3051d16e9cc72…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 08:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e6436e012cad6c1f85664006db173da SHA-1: b2aba29f8c46d98efd8c66648f9ad0986c52aa0a SHA-256: bea3051d16e9cc72f973792197c0a59462c6153be9f0548904414d06fb50384e
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Resident Evil HD Remaster Repack' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The ML classifier also strongly flagged this PDF as malicious.

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=resident.+evil+hd+remaster+repack
    • http://urlca.com/17lsmd
    • https://static.usrfiles.com/ugd/b8c837_e2f9d3322edc4e20980356a1bc218064.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fde20de732f4948909f569345c69715.pdf
    • https://static.usrfiles.com/ugd/b8c837_92d019ecb801464db47676ffecc597f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab10d256cb7b4a27a94797658bcb401e.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/lowes_easley_sc.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/94318769136.pdf
    • https://cdn.shopify.com/s/files/1/0436/2996/9561/files/menududagekesugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/hotstar_cracked_apk_onhax.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/samefuwar.pdf
    • https://static.usrfiles.com/ugd/b8c837_d762bab8e367463a80d8b9eff268446d.pdf
    • https://static.usrfiles.com/ugd/b8c837_48f77f2cf4a64f738f36d47e914ca929.pdf
    • https://static.usrfiles.com/ugd/b8c837_be7fa280f0f7406d832ece9bff050d7e.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_off00005abf.bin
898d99684d4311228ea8ab01978c3ba7bb0dbaf7e52153bac85a4acbdf8a4096
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABF 5476 bytes
font_01_sfnt_off00006d32.bin
6ad540a8e0805e27cf3428926783e172491f810ea4d531948e0485e76d9ae43e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 10376 bytes