Malicious PDF — malware analysis report

Static analysis result for SHA-256 074684117d080b6a…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 22:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a735c38b4a7b83d1b2a01c6b44db051 SHA-1: a67535cbe907d23df5fee68a87a728b0fcb233eb SHA-256: 074684117d080b6ab42ccb255b892786350dd3af666dde20b8febdaa62559aef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, appears to contain references to the redirector URL and a list of other PDF links, suggesting a link farm or SEO poisoning tactic. 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.ru/wix?keyword=gillette+proglide+styler+user+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/43d598_f9d1a416c19d4673bd6da3d9657e250f.pdf
    • https://static.usrfiles.com/ugd/83e24f_7ca83e5589264386a934c579068ae57f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dfd60b35f3e44b8b92fc60f917c2efa.pdf
    • https://static.usrfiles.com/ugd/f0e51d_7a0b4e882f5f437e9c6bd6d2b237eed6.pdf
    • https://static.usrfiles.com/ugd/3aee12_89fe9f99fef44e0dafc9c2bfd12f05ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cf667b027d048ed83fedcfa84e3f7d2.pdf
    • https://static.usrfiles.com/ugd/585b1d_66fc947ace1e4173ac4312237c8c14b7.pdf
    • https://static.usrfiles.com/ugd/26481d_9872e5d6f526432b9ed18f3270adfb58.pdf
    • https://static.usrfiles.com/ugd/b8c837_41b445d729604eb491da607c374981f2.pdf
    • https://static.usrfiles.com/ugd/a58b01_ee5d51826e9e4a1f8a558d6d6a5dd40b.pdf
    • https://static.usrfiles.com/ugd/cac9e4_44a35c173a7a4c499d6333a8191acff1.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_ce249cb770c04ca98e884e79080ec037.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5e07f0d016147b8b28ddc512b72ef60.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_off00004d8d.bin
8400c284196c601a3d36ef47e19f3c5db8f04a72fbb010292e4cc9bab1549ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8D 5296 bytes
font_01_sfnt_off00005f82.bin
badc95b2e46ee655f070f3a427dd03c3e2d1fd1e61ec3a65b48ca41e0a868924
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F82 10496 bytes
font_02_sfnt_off000082d4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 4324 bytes