Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31397e6b96606e3…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 12:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef4a511eae4cb13d7171777cd1b5eb7c SHA-1: 95fa6177b3963b523c40a9d6ee6c828785a35cc2 SHA-256: e31397e6b96606e328cee2264343cb67b808f35ddd3a8a50dfb7406e441b2cc2
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.club/wix?keyword=a+state+of+trance+2019+album, which is identified as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to lure users to malicious sites.

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=a+state+of+trance+2019+album
    • https://cdn.shopify.com/s/files/1/0433/9132/0214/files/95331557683.pdf
    • https://cdn.shopify.com/s/files/1/0438/9293/2763/files/mandated_reporting_pa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/xujukazolekigaxepasore.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/66409813156.pdf
    • https://static.usrfiles.com/ugd/0d9a50_c74214223a264e8eb1313d6033ab48d8.pdf
    • https://static.usrfiles.com/ugd/89363e_915b68c8e1774c1aa71c015d4e13ad84.pdf
    • https://static.usrfiles.com/ugd/d1d005_b2936718fbe04de087cd180df382ccaf.pdf
    • https://static.usrfiles.com/ugd/b42fd6_b6823c6f549b46fdb4615ac4bf8f99ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff482b99a2044902bd9b5e8ca62e7d65.pdf
    • https://static.usrfiles.com/ugd/b3bc21_d185154c903a4990b80671cbdf72d493.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1650010c74a4b21bfcd43e6d698b70b.pdf
    • https://static.usrfiles.com/ugd/b8c837_53a7fedf08264d8fb54df5ea5411a767.pdf
    • https://static.usrfiles.com/ugd/003b86_5302b1c2e2bf41e1b7fb458c716aada1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa41ffa18ba4e1197b953e9ff1370bf.pdf
    • https://static.usrfiles.com/ugd/19103d_93e1a3b1874b4165bc79b86268a54f33.pdf
    • https://static.usrfiles.com/ugd/2e16aa_a52f95f2e36f43a28bfb0fae2d0c6abd.pdf
    • https://static.usrfiles.com/ugd/91e123_9a9e24983a76445fbd660bd354928701.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_off00005ece.bin
53aa6a754e1a9237b4a6fc62da4bf4e96db5bbacc6cf4289b899786948b9cf9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECE 5640 bytes
font_01_sfnt_off000071e5.bin
b089ee9ec03dd9900467a4c09b489a14d65aa83dcff89ff0cb21a91708b5d1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E5 10096 bytes

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