Malicious PDF — malware analysis report

Static analysis result for SHA-256 641be01102ce3d71…

MALICIOUS

PDF

57.5 KB Created: 2020-09-03 08:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 224dcf056f4966981d965b83ce79316f SHA-1: efd9dd0743909bce9139ddd7b13f4188831b9659 SHA-256: 641be01102ce3d71eff57defccebe6aae5b5ebd8150b9cc768b6c863f04e2d00
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.club/wix?keyword=warhammer+codex+pdf+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references 'Warhammer codex pdf free', suggesting a lure to download content. The presence of numerous other PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=warhammer+codex+pdf+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/73f3b0_ec503256447f436690b26235afc396dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_fceb8642e2314bf49b72c69d942b1f56.pdf
    • https://static.usrfiles.com/ugd/18f527_93d7442e8ccc4d9e9a8c17b200ac5570.pdf
    • https://static.usrfiles.com/ugd/227d0f_81c624fd893f4bf9a55f64e0b791cabc.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_006571b9910a4901abc6790035c85ece.pdf
    • https://static.usrfiles.com/ugd/1decf9_7826faf6fa2f4a15889c3dbc37a4e04f.pdf
    • https://static.usrfiles.com/ugd/7cefa9_4b603ee2ca4946f8b8ec76c090be6653.pdf
    • https://static.usrfiles.com/ugd/aa14a9_6e0cd4b9841e430aa3d6d07a15e5a213.pdf
    • https://static.usrfiles.com/ugd/33ab24_bde7a2b4f26a43ab9be7e8b612a466b9.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/49385048896.pdf
    • https://cdn.shopify.com/s/files/1/0463/1933/7632/files/75559899050.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c4b.bin
3fee734cdf73a44cb0ca4c31e5134b6ec844b76981d34b8a5060fb73e8641695
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4B 4820 bytes
font_01_sfnt_off00009cb1.bin
2c8c544d9fd847614b1d5a3d7f120d08e885a1c49b29dd45001280f463fd05f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB1 14956 bytes
font_02_sfnt_off0000cb8f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8F 4324 bytes