Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e5f47a3d5b4fe2…

MALICIOUS

PDF

34.0 KB Created: 2020-09-01 03:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e63b13e19443caf7178371d2b22e38f SHA-1: dd66fc569e4a1c3b8f7be8b9617295ff9ffc1e89 SHA-256: 08e5f47a3d5b4fe2548bcdfe38ae43d4503d6c7960f457262c44a4c685bba1a5
154 Risk Score

Malware Insights

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

The PDF contains a link farm with a primary malicious redirector URL, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL, indicating an intent to redirect the user. The ML classifier strongly supports the malicious verdict.

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.ru/wix?keyword=idn+financial+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/59401795221.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/89135514328.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/71730003926.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/tufez.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/19299163221.pdf
    • https://static.usrfiles.com/ugd/c836c3_9c607eccd68d4fa48a7824ee420941dc.pdf
    • https://static.usrfiles.com/ugd/432b07_25b3b28864754f6db7b4b33777cbf5a8.pdf
    • https://static.usrfiles.com/ugd/bb13a2_e486c08bbdb641bba0cb93e97ec3dc85.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bd2b37cbcc6459291809f6be3e03594.pdf
    • https://static.usrfiles.com/ugd/cfa91a_fa3e03ef5776441eba20f5b7513ab24b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdfa90182a5d4bc28e25f13ed5d7ec77.pdf
    • https://static.usrfiles.com/ugd/b8c837_368b52a6506f474486ead39902221bed.pdf
    • https://static.usrfiles.com/ugd/e6092c_9d501f7505804acd8d4da9b6e3f25f6f.pdf
    • https://static.usrfiles.com/ugd/fd3290_a781a847d9d5442fa24bda7e3f458a80.pdf
    • https://static.usrfiles.com/ugd/eb4c03_dfae48b11a464221bf02fa092a11b0b4.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/56962431003.pdf
    • https://cdn.shopify.com/s/files/1/0436/2806/9017/files/tunnel_boring_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0033/files/luzazevogibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/67552776891.pdf
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/mathswatch_recurring_decimals_to_fractions_answers.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_off00004923.bin
000a2466d09ffe82f4f4cae03c468968ae8cd21145a3f82f36a4f96e95b397cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4923 4908 bytes
font_01_sfnt_off000059e4.bin
c700a70e3991811c72b59b4c5ad216d28dd868b050eeedf86a57b43ec8abd911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E4 9772 bytes

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