Malicious PDF — malware analysis report

Static analysis result for SHA-256 0891c5da6423e5a7…

MALICIOUS

PDF

41.2 KB Created: 2020-09-17 02:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1b788578babfcacd2c85989b57be486 SHA-1: 9cf3ce763014a500488d6cfcaa0b3ab2a22571f9 SHA-256: 0891c5da6423e5a7d6610d249f7f36f3517ba3c70c2efa9d41a465c632c0940a
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as information about a driver's permit test. This link leads to the URL https://ttraff.me/wix?keyword=hawaii+driver%2527s+permit+test+questions+and+answers, which is known to host malicious content. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly indicate malicious intent.

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.me/wix?keyword=hawaii+driver%2527s+permit+test+questions+and+answers
    • http://wemanobew.upstagenydanceacademy.com/uploads/1/3/0/9/130969525/lapubodujexu-pejitug-vanutizoju.pdf
    • http://robur.ahistoryofno.com/uploads/1/3/0/9/130969724/podolubivumowe.pdf
    • http://fokumubul.provencedecor.com/uploads/1/3/1/3/131383544/xepem.pdf
    • http://files.royalanimalhealthuniversity.com/uploads/1/3/1/4/131437859/0d9a4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0467/5734/7491/files/brevet_reporte_canicule.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/a_brief_history_of_neoliberalism.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/id_card_template_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/fuwetumogekud.pdf
    • https://ce81d97b-b64a-4865-bb08-9750f8a648de.filesusr.com/ugd/fc840b_3f8616c7382842738f63964c35daae34.pdf?index=true
    • https://54ff0802-2704-42c7-9ffa-0b8c71be9296.filesusr.com/ugd/d99ef3_4f7db881b5e149b4a8da1f0329b00384.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/32974855023.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/jopugazolet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7207/files/24866816993.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_off000062a5.bin
64747febb1e10f95136e7a95f69d476f708d6eb3219a3133bee1a3b2df5951cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A5 5348 bytes
font_01_sfnt_off000074da.bin
bd18efd7d0f47290daa70f9f89d1950e4213c2e7475472606d66a904aebae910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DA 10216 bytes

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