Malicious PDF — malware analysis report

Static analysis result for SHA-256 67983bfa7cf2305d…

MALICIOUS

PDF

80.3 KB Created: 2020-08-29 23:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b7299692bf0240793cda337e4a4788 SHA-1: 2028fe9d8d63cf3b670b7fa27ce2b6cc9261ece2 SHA-256: 67983bfa7cf2305dd19b9a1649fe93f24001779be12b859c78699775f6c770a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with one prominent link identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious websites, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.link/wix?keyword=darksiders+3+strategy+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5fc6c97f93bc4691a976cd63338b8b70.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b71d75ab8ef4596b2a344b295b1484e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c336f6b72fef46c2bcc4e53015fc24bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0430d59fc6b84d73877ca041e394734c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b06a2d3d25fc4f509533f5b8e18b48a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdfc22dafde64875ada98deafc55b3ca.pdf
    • https://static.usrfiles.com/ugd/3aca14_3fc742f1c4854f1986adddd52b55a957.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_f55b601a3a5c47c3af7ab206c76b4ca6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7636953b3c9450b99517d154c542f6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/b8c837_89cef761142c4c779db0111a0104eadd.pdf
    • https://static.usrfiles.com/ugd/0047a4_20bef7eb001c4231a1ee0a5ce1b045ac.pdf
    • https://static.usrfiles.com/ugd/238140_75485872d2a543a28a6c3b05c37a1041.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff8fc0a5d54a477b934dfb077d2d202c.pdf
    • https://static.usrfiles.com/ugd/b8c837_779b68eb25c74137b70b912d9a4bf8a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_1068a86272d44ee79c5c33a8e5e7a9ab.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_off0000fdd5.bin
dfc956d656ad2e624eead029e2287c5e874ebd1dfa7c45f457ca958f1607c113
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 5292 bytes
font_01_sfnt_off00010fea.bin
95203d954a03de020a263e6a772b4be38871248e0fe7d78888cf6aa343d3f678
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEA 10628 bytes