Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db0aeb7a5901148…

MALICIOUS

PDF

62.4 KB Created: 2020-08-11 06:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9593ce371bda19e32b3be5667adb0b22 SHA-1: 3d298eb96df7c9cd647ad2cf9c1abe5ff9005df2 SHA-256: 0db0aeb7a59011489288334f0bc8aefc483f9c8f021b30fa6c1c20e5235c2c97
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy, aiming to improve SEO for malicious content. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

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/pify?keyword=iit+mechanical+engineering+projects+pdf
    • http://files.damascusbaptist.net/uploads/1/3/1/4/131406604/2357634.pdf
    • http://files.royaleliteweeksrental.com/uploads/1/3/1/4/131437299/5122364.pdf
    • http://rufejojam.dementeddesignsoc.com/uploads/1/3/1/4/131406507/gexemejedulu_tugebowujatig.pdf
    • http://files.ashleynelsonnd.com/uploads/1/3/1/4/131454620/fifuxut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/wipagigavaxise.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/8301191261.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/xopikuvojobupokewowowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/54958516793.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/13760835813.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/cannonball_adderley_omnibook_eb.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/mevuvosufuredewadin.pdf
    • https://cdn.shopify.com/s/files/1/0448/0139/2801/files/discord_server_themes.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8264/files/ballast_water_management_convention_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/18045027481.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/19225112576.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/chinese_alphabet_and_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.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_off0000ab82.bin
ea4c7276a09ab85086aa76ee5caba11eab6bf69acea2351aa50c464722e9a2ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB82 5584 bytes
font_01_sfnt_off0000be58.bin
1154baf220e39bd19b732da3cbbe0b3864a89941e02cfd860c8cbc709d57b07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE58 14940 bytes

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