Malicious PDF — malware analysis report

Static analysis result for SHA-256 2150009bd867e4fa…

MALICIOUS

PDF

56.6 KB Created: 2020-08-30 22:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7dbc1f7055848665b9902a9a045029f SHA-1: bd62662293eb913c643710ecf8b83e3ba3bb7973 SHA-256: 2150009bd867e4fa671a0eaaa6c32e65668e5da0082bb2c3186fec9f9fef2818
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, specifically 'https://ttraff.com/wix?keyword=benq+xl2411+settings'. The document body, though heavily obfuscated, contains keywords related to 'Benq xl2411 settings', suggesting a lure to attract users interested in this topic. The presence of multiple external PDF links also indicates a link farm strategy, common in SEO poisoning attacks. The ML classifier 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=benq+xl2411+settings
    • https://static.usrfiles.com/ugd/b8c837_0c229381b3234119b6e2f3cf2d5456f1.pdf
    • https://static.usrfiles.com/ugd/565485_e63a3a5eba0f47578c971b1d063e2bcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_043b03a4fe244744ae6adb5078defd7e.pdf
    • https://static.usrfiles.com/ugd/63022f_2929e611f7c24656ad7accbce30f4840.pdf
    • https://static.usrfiles.com/ugd/b5472a_6ee5ac7bbf384276b02faf378fc1dc68.pdf
    • https://static.usrfiles.com/ugd/bb13a2_5963b327a1ea4337af42f553785273ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_0444f4670e5641759cd886d5c46e78c8.pdf
    • https://static.usrfiles.com/ugd/5e8de6_1a0eb6a731904174afc456168e25cce2.pdf
    • https://static.usrfiles.com/ugd/6240f8_7ff35e2598e74845be4ed75f812fd5de.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9b8e2d6641343489e16d1e6645c7033.pdf
    • https://static.usrfiles.com/ugd/c63dba_2e1400bb268347ac8bb6ec18d90428be.pdf
    • https://static.usrfiles.com/ugd/2f7815_ca87bb0528f042eb963bc5dacb172bf5.pdf
    • https://static.usrfiles.com/ugd/defdb4_54918d6aed7c4e36a881fb231ca2e167.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_off00009dfc.bin
ce719b988ab863d35c883cc71a23021693969d1084114ff31b71f8530a40db35
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFC 5064 bytes
font_01_sfnt_off0000af61.bin
002f8c94725d94637434b4255f589b8ad2b0c7afd9a3869f5a7f833ce8cad40b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF61 11248 bytes