Malicious PDF — malware analysis report

Static analysis result for SHA-256 86661dd12356f537…

MALICIOUS

PDF

33.6 KB Created: 2020-08-28 20:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c90c74ce62525820581306afb7ccf425 SHA-1: 5aa091f2fc9661d138a4de05f71442f62b8655ee SHA-256: 86661dd12356f53793a63dadfc8e46859b1be95dbd9c00bca79f3ed9ef1cc9b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is known for malicious redirector activity. The document body itself is heavily obfuscated but contains references to the malicious URL and other PDF links, suggesting a link farm or redirection scheme to distribute further 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.com/wix?keyword=tuhaf+dergi+sat%25C4%25B1%25C5%259F+noktalar%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_84f3a972375442739521796887dddbbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_beaf0f4ae0944100b8047c300d0beb16.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc080baa162646358e8b757e5896221d.pdf
    • https://static.usrfiles.com/ugd/b8c837_35f58c7f1bdb4e2b92f86599e2795825.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/titapotexovugerumoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/yoshimeet._com_with_two_e27_s.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a12568969754dccaee4bf1f88b6d39a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f9c85f70c984a9ea71bcdac4e2a5f33.pdf
    • https://static.usrfiles.com/ugd/b8c837_042007822ad24e519d279f0d3604b673.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea4791ef89ca4ce79789d26a538d9868.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbcd355dca4b453e893ae47c2ec72677.pdf
    • https://static.usrfiles.com/ugd/b8c837_96711c4ee1d3412d9f57b6d255b93abe.pdf
    • https://static.usrfiles.com/ugd/b8c837_a88913aca34a46ac801ddf5c6929cbb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_77151b43802844539594be89dd31bea9.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f50a5e426af48a5a32e29de52799ca1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043c5.bin
7dd48c10f5abb70f715201cea0afb3c0838ae829c78a87e170cf5d87b51a1d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43C5 5460 bytes
font_01_sfnt_off000055d6.bin
0c47ba945c6991f524f1b3615ace84aaf201111bda54d591f6155861e64954a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D6 10664 bytes

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