Malicious PDF — malware analysis report

Static analysis result for SHA-256 68751f7790482137…

MALICIOUS

PDF

45.0 KB Created: 2020-08-18 13:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855b062dcf7783b79caf38d5071067da SHA-1: 5a53d74196c3231edc13bccaf326120f376e9642 SHA-256: 68751f7790482137ad97e1bfc864df442a589659ef59e779fe350dbcffd06341
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of the URL 'https://ttraff.cc/pify?keyword=bsf.+nic.+in+pay+slip' strongly suggest an attempt to lead the user to a malicious website. The 'SE_MFA_LURE' heuristic indicates the document is designed to trick users into providing sensitive information, such as one-time codes or MFA approvals, consistent with credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.cc/pify?keyword=bsf.+nic.+in+pay+slip
    • http://files.neurovestibular.com/uploads/1/3/1/4/131453288/sodofazezepa.pdf
    • http://files.littlefairygarden.com/uploads/1/3/1/8/131872070/1a8a508b.pdf
    • http://files.schneiderfamilymemorial.com/uploads/1/3/1/1/131163780/pomujatuwuwot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/barrier_free_design_guidelines_alberta.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/introductory_combinatorics_brualdi_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/the_satanic_bible_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/95431344696.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/31731492222.pdf
    • https://cdn.shopify.com/s/files/1/0449/8941/5583/files/xunasotovegukaxuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/57145173224.pdf
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/39842158908.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/data_mining_and_business_intelligence_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/data_analysis_skills.pdf
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/11228592152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000656e.bin
ca57f5c9dc431d7a021bd1135f1fcfa65fbf9a20eaca02dd4b1bd089b87e7834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656E 4576 bytes
font_01_sfnt_off00007505.bin
4add0408c7ffbf7d5e3a46c2568b2c383dd2ceafe2461754dbbeaf3fe00f2de3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7505 10408 bytes
font_02_sfnt_off000098ad.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98AD 4324 bytes

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