Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f111be6bc4414e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 02:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d5c7f92e4fbda93a2fd0ff1b574d11b SHA-1: fe245063da2234e629aaba5ea248c8ba794790e4 SHA-256: 21f111be6bc4414edce8e48e85d7cd5cff703830d4601bca50e2ececff739add
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a detective story. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute the malicious content.

Heuristics 3

  • 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.
  • 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=kr%25C3%25A1tky+detekt%25C3%25ADvny+pr%25C3%25ADbeh+o+Sherlocko
    • https://static.usrfiles.com/ugd/5899d5_aed85c23b84843f28f94ef12a95d46bd.pdf
    • https://static.usrfiles.com/ugd/34e21e_b92219f6525b486091715bacd0ffecd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92885005f1e4e63921941a4326e60d0.pdf
    • https://cdn.shopify.com/s/files/1/0430/3319/8745/files/90298407763.pdf
    • https://cdn.shopify.com/s/files/1/0460/9723/6132/files/lejarubosegimader.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/abductive_reasoning_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/kuvojulewufeneravowesubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/71998652098.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/wosabawobinoto.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/nimimepunuxakulokako.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/payroll_accounting_bieg_toland.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/handbook_of_big_data_technologies.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_off00006e04.bin
908d44ac73f6802347c0c97ea70a9901e3d4d197e876ae9abdbc472b7c131169		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E04 5592 bytes
font_01_sfnt_off00008102.bin
f01c4ca515c331a0a740cc16f4b8da4fe9f0fb8d627345e1d5c9a60a284285a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8102 13016 bytes

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