Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e72dc17edbfdfb…

MALICIOUS

PDF

52.7 KB Created: 2020-09-02 15:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8942a8923dbcabff5186c74f5025a81a SHA-1: 63ba971b28d9fa469ceeb42c0573642bffc32c1f SHA-256: 68e72dc17edbfdfb02a39418697ebfa84a448384f5f678915f30eb07427400e8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many benign, indicates a potential link farm or SEO poisoning attempt to distribute the malicious content.

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=awesome+mix+vol+2+full In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/d5415a_f22509e16e864531bf430f4948087283.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c4ccc4_0e15de5df57e4fd8994cd3a7165466f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/67f5f7_04ce61a98f0a48178c5f39c771d02e6e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1121/0398/files/lalekesafosurakojiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1196/files/fraction_division_word_problems_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90142435821.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bbd1deefe7a54f4dbca983e56ddde0bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c20ea7_feec6779b4a740379458d85a5871a065.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b78163a9bbf3495c8c4378ef908fa1d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eb4c03_6a50e616b21d43c4b6bcfad52ca2f5c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ea6993ee717a4ae3825905e4c241461b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bbe2a590fbd047d5a0b40049920423be.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74e905_3d383ef913da4bdbab82f093543c58d0.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8333 4644 bytes
SHA-256: bc94600ed69a71113b47819055170d47578b8132675448e09acee25d4156123f
font_01_sfnt_off0000931b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931B 10664 bytes
SHA-256: fc067eaed6417074c4a0cea83343408d504f04b2501b48dd817a8e34073def6b
font_02_sfnt_off0000b791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB791 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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