Malicious PDF — malware analysis report

Static analysis result for SHA-256 68697f2f891889ad…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 12:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c8e76317e4c592c01039a092bfdc12 SHA-1: 6eb6afa78ff45d3e4b5de7bddae0ee6c11a756f3 SHA-256: 68697f2f891889ade67321ac882fbae74baf998411e9f962bcefc67832049f6e
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a 'powerpoint calendar template' lure. The presence of embedded links and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a compromised site for further exploitation.

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.ru/wix?keyword=powerpoint+calendar+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e23fbb_bee1ad855e604d138e2f49ec85384139.pdf
    • https://static.usrfiles.com/ugd/bfbc46_acdc98684a374683923aa0e9e9b2fe61.pdf
    • https://static.usrfiles.com/ugd/97493d_3c05c911d180494fafa7359e5dfd33af.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/gizamoniwazelogafo.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_ba84cb819db2493a83f4dbc51b01b5fa.pdf
    • https://static.usrfiles.com/ugd/18f527_e4898d1ec0ab464a80f08e398fde8ec3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5721da99c474acd9b377d6813ebcd16.pdf
    • https://static.usrfiles.com/ugd/a64c8c_9b79a12f5ebc466a80193187a96ca5fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9237612323147479921e1837dbe1c75.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/67446210405.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/vonop.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/anet_a8_cura_machine_settings.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_off000065f0.bin
f1dd0d4a577cdeb3ebb4bc2b4271e3ecdaabdabf8badc908456ce773fa9a6663
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 5136 bytes
font_01_sfnt_off00007765.bin
549ee8a7007e4fc0eefdf5e6b4e7175b35251ff2e9a492a76f73504fb26445fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 10284 bytes