Malicious PDF — malware analysis report

Static analysis result for SHA-256 773e5cfd7a9f3c18…

MALICIOUS

PDF

53.7 KB Created: 2020-08-29 15:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616fb2e736fcf5a14a9b50a51117b9b5 SHA-1: abb80390f767b826102be37b44e275ef90f35ce7 SHA-256: 773e5cfd7a9f3c18dbde925207f2b63a3030ad2ae0c31f27afb1280cf76f42dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. This URL is embedded within the document body, suggesting an attempt to trick the user into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier also 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.club/wix?keyword=subgeneros+mayores+del+genero+narrativo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/85482682732.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/73866435169.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/demorifinotazijoxajakuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/agile_testing_lisa_crispin_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/wilogabamosuwedo.pdf
    • https://static.usrfiles.com/ugd/b8c837_6af7c90fc7c6482182a8da4ad1b15588.pdf
    • https://static.usrfiles.com/ugd/7598fa_29336d53f8d548699f40e2308405580f.pdf
    • https://static.usrfiles.com/ugd/8cbfce_c758fd7b9bfc42ba9946000a9c5cf7b8.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_53bb41970fa74fed87b1a6387d4da263.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/ssh_config_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/29883771817.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/kujakutaxojasubiniza.pdf
    • https://static.usrfiles.com/ugd/b8c837_59576f33e5104edd9ab1cbd62367a1f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bec8841ca7bc4414be601f9d0ff2c196.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c812687292e4fcaa4ebee776ac7fd1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f8021d585d54564b8246edea1919694.pdf
    • https://static.usrfiles.com/ugd/b8c837_69da876a184d473f84d75952e7aff08e.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_off00008591.bin
41e000a9ce67a9665e917a34678b977d7b240f2a4123b317a14aadbcbf2b3821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8591 5432 bytes
font_01_sfnt_off000097e7.bin
09b39ca1164e836b1c4f89e2e53fbcadc29a5d4b7f363b3635ad8ecb29e4e57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E7 10852 bytes
font_02_sfnt_off0000bb2a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2A 4324 bytes

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