Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a27cb47c79ea87…

MALICIOUS

PDF

63.2 KB Created: 2020-09-02 13:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62558e1676cd6157c0da04af84a8e4f4 SHA-1: edf327ed026f31f903c9776a8dd91dbfd4a3f801 SHA-256: 18a27cb47c79ea872d520913109277e74e81292600e107276892a8cd79de8656
234 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector, and the heuristic 'SE_BROWSER_INSTALL_LURE' suggests a social-engineering path for malware installation. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=chrome+for+ubuntu+18.+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_49de9b72dd4b4994967c082c2c7f984e.pdf
    • https://static.usrfiles.com/ugd/c836c3_cc7943a9cfb74b9c82afa11b16f3370a.pdf
    • https://static.usrfiles.com/ugd/11276f_34293e70ddea4a5ba0d405153b59d33c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e707caf40bd040a69b6ad77e1cd1982a.pdf
    • https://static.usrfiles.com/ugd/625844_8fabd2b004be4203bdc04c933b6aaf63.pdf
    • https://static.usrfiles.com/ugd/f68081_c6d03e78628540308549e58ae5f1127a.pdf
    • https://static.usrfiles.com/ugd/469aea_2c0fa2c8517842beac6cec302c1f3565.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2106/files/vafan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1685/files/web_design_email_marketing_templates.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9578/files/basic_pencil_drawing_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0432/7437/1235/files/mobemodajilakafelifalal.pdf
    • https://static.usrfiles.com/ugd/3f8d85_fb8e65dd6fc143078377c1a60484d0ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_82d68c2fe8a948b0bf6390ae701f5144.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_3f689dcebf764623bd61ebcd13de8a38.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e4.bin
76e8fac27e411aa50a56291ee1af1ad75120cebd9c76fe1a155f7ae8146d04ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 20848 bytes
font_01_sfnt_off0000a355.bin
e1b91100ef7178ddb584288868d5c46e6157d5ea23d6affaa9ee50ca154406c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA355 5052 bytes
font_02_sfnt_off0000b467.bin
3fe8188f73516600244a6f28f952e0c0e40816e4ca75a6f3c25823a220167ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB467 10996 bytes
font_03_sfnt_off0000d9c9.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C9 16312 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.