Malicious PDF — malware analysis report

Static analysis result for SHA-256 120fef492ccb2048…

MALICIOUS

PDF

38.0 KB Created: 2020-08-31 13:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee8562a60a31541f94472748485aec56 SHA-1: 03093c4a1bf8ebcf526d243b59d51687e15b1f3a SHA-256: 120fef492ccb204828bd173397019e4a8bf3b47a9c1bac9cbab110e2c1fee7e4
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=parasite+eve+guide+pdf'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign Shopify domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a lure to a malicious site.

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=parasite+eve+guide+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3996/4834/files/forty_rules_of_love_by_elif_shafak_i.pdf
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/zejulosarirovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/96768928267.pdf
    • https://static.usrfiles.com/ugd/b8c837_17c8f6c4e40b4f0fa3f29c9311347c6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c9ac6d87a2b44e1a8b8648094a9387c.pdf
    • https://static.usrfiles.com/ugd/99965f_79ca57183e7d4b5f9860c0540aba53bf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/99654261926.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/47649083326.pdf
    • https://cdn.shopify.com/s/files/1/0461/0903/2612/files/exercicios_de_funo_sintatica_dos_p.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fexofedome.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f49.bin
56aebb973ca42680fbdede5808a0213133c1a69882b727d68a066f7bfd4775ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x3F49 3496 bytes
font_01_sfnt_off00004bbe.bin
8680ef9e3ffacdb746fde0d71e8365b630feaa5aa3a5bb5d9479c11a36433587
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBE 4904 bytes
font_02_sfnt_off00005c84.bin
d22aa5c2a4233611ac864b26dda87159c800d6e6ece1ce4ae005da263e01cc1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C84 9668 bytes
font_03_sfnt_off00007d2b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2B 4324 bytes