Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2b91644be753fc…

MALICIOUS

PDF

39.8 KB Created: 2020-09-02 19:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a253252e26fb1d8eeffa87ac09e80d49 SHA-1: 66edffc6f81c7a5521e3dc386fbf4ca47cce96ea SHA-256: 4e2b91644be753fcab6f3529e89fe5d9ab9de44c209bcd7d9d4a1175df6e7cd6
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, 'https://ttraff.me/wix?keyword=co+parenting+therapy+worksheets', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious infrastructure under the guise of providing worksheets.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=co+parenting+therapy+worksheets
    • https://static.usrfiles.com/ugd/b8c837_6f8629d34a104fcbbdbd889419644290.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_f452ce74a80b4a479318e90fdcb6488a.pdf
    • https://static.usrfiles.com/ugd/12f4eb_91336d25ea334725959d1278e667c7ee.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_1c273f8e6d5b4d94b27ab2fabaeebcea.pdf
    • https://static.usrfiles.com/ugd/23b571_3132d0febd8546d58866a53f03e2bc54.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/la_boite_a_merveille_chapitre_1_analyse.pdf
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/25216680511.pdf
    • https://static.usrfiles.com/ugd/63d3ad_f274ecb7891349329ca9e7ae56640314.pdf
    • https://static.usrfiles.com/ugd/d54300_5d0e6bb336744bbca9a894d499cee574.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/netabebi.pdf
    • https://cdn.shopify.com/s/files/1/0457/2951/3638/files/introduction_to_management_science_5th_edition_solutions_chapter_3.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_off00005bbe.bin
37ef6051a99804abe16132769fa650cf4fade66443ae60a0717ee78286479ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBE 5212 bytes
font_01_sfnt_off00006d85.bin
4d84a86b4e8d818ab8dbcb0753740e796ca4bab3eea99845078f68827ef4e7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D85 11372 bytes

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