Malicious PDF — malware analysis report

Static analysis result for SHA-256 586e10ef436a6a87…

MALICIOUS

PDF

39.4 KB Created: 2020-08-29 22:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dea9d1248929fdffd15334343ac2b8d SHA-1: 8710bf51accb9105e00b6b2a189a8467770c5829 SHA-256: 586e10ef436a6a8754847f41a2606756e586cd17a59c7e501ad00f3b3737e645
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on cdn.shopify.com, one of which is also present in the document body. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be luring the user to click the malicious link, which is likely part of a phishing or malware distribution chain.

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=et+est+ce2
    • https://cdn.shopify.com/s/files/1/0440/9786/3832/files/digewadejinaka.pdf
    • https://cdn.shopify.com/s/files/1/0460/2150/9279/files/azure_cosmos_db_connection_string_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/blitz_chess_tips.pdf
    • https://cdn.shopify.com/s/files/1/0435/6449/9105/files/sufimi.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffaf3c61f6b24b06917941de46807d89.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f496e21c71f4133bbef8f40766c2897.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/dinozetusoragu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/36142646750.pdf
    • https://static.usrfiles.com/ugd/50c35f_76bdc03a5bb9456587fa5037d70f337e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f387e4aade1d4fa9b16ff9bab8f379b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ec284379e554faf84c97e216abefd89.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b30.bin
1cf0fb2ea46decf26c2b1ba599943f9705651c8e520fe2af7d8486ae13bd8ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B30 4544 bytes
font_01_sfnt_off00006abb.bin
41c8b8f4bf023343f1b4fdd285a80c883a0c74f86d5d54edf0ccd8d8173f7b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABB 11892 bytes

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