Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b6a871ba9ee181…

MALICIOUS

PDF

76.6 KB Created: 2020-08-29 19:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 336b9cb73f1d2f8a9fbb5d430a7c1f85 SHA-1: ba3d7cd73475e787f3a3efef252a34a008e2b099 SHA-256: 07b6a871ba9ee181349a913ccf4a1cdeff9670ee1989d7b4b263ef4cc67e7683
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO spamming attempt. One prominent URL, 'https://ttraff.cc/wix?keyword=divinity+2+drowned+temple', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating its likely purpose is to direct users to malicious infrastructure.

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.cc/wix?keyword=divinity+2+drowned+temple
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_91508e7358304576842ae55e365186eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_84a0b93aa568496e8e1fa3454ffecf22.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c28141f139f4963a7afeef6ed5cd7e6.pdf
    • https://static.usrfiles.com/ugd/c3548c_436c88fba10c4b0a86b83f79b095bfc7.pdf
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/computer_age_statistical_inference_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://static.usrfiles.com/ugd/b8c837_33cd5fcea05f4980a3ff62f771fb2855.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a03a42d08d2456c818c1df141d2c68a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dfe3cd130d2468e9d7e37d35cffdaf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a644aabf54cd4891aee24555feb8c015.pdf
    • https://static.usrfiles.com/ugd/b8c837_716b483145c944f1824c43be34c6ec4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_07761a20b169468d989b6dfce4f0a24c.pdf
    • https://static.usrfiles.com/ugd/5b9a87_3e5a3f8463354d9a9e1553ad1c2d2485.pdf
    • https://static.usrfiles.com/ugd/b8c837_0430d59fc6b84d73877ca041e394734c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fb55a0add6e4304b3a96b56f0bdc8e2.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_off0000f0dc.bin
2e0a2a87fdb72c6788dd20b63c22ade049fc1868922dfeed06a5580532d75da6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 5100 bytes
font_01_sfnt_off00010245.bin
88545bdb8c83837f86fedf01186bad6bc709bd0e70c192107d17e8575d84462d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 10492 bytes