Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fd821e574b0e2b…

MALICIOUS

PDF

42.6 KB Created: 2020-07-08 17:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2790dca50b619a218fde83d212c3890 SHA-1: 56170ebf67742eafb706a2b17f413ac1a9267d1d SHA-256: b6fd821e574b0e2bf41b6877d6eaf1393c662a40e488dc3deea717cb6b28011a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One prominent URL, 'https://ttraff.com/wb?keyword=history%20of%20ethics%20in%20psychology%20pdf', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content or phishing sites.

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/wb?keyword=history%20of%20ethics%20in%20psychology%20pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.pjeterkoleci.com/uploads/1/3/2/6/132681938/f414f68e3faf.pdf
    • http://files.companionanimalmemorials.ca/uploads/1/3/1/4/131453735/4653697.pdf
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • http://files.faiths-boutique.com/uploads/1/3/1/4/131483440/sebowekoribap-kinex.pdf
    • http://files.independentscreativegroup.com/uploads/1/3/1/1/131163945/61c59bc.pdf
    • https://xogiguwoj.files.wordpress.com/2020/07/81547111683.pdf
    • https://kukoxirawa223356294.files.wordpress.com/2020/07/xupunofetak.pdf
    • https://kubesijodoli.files.wordpress.com/2020/07/96256700314.pdf
    • https://lifelig.files.wordpress.com/2020/07/xejakeneparelas.pdf
    • https://takipeximon.files.wordpress.com/2020/06/xatajekopifoxamexaxozi.pdf
    • https://juzuzenevide.files.wordpress.com/2020/06/rajozab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.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_off00006a32.bin
43c05fddaaf77b40671bae5ec2e4635a87125a0efdf8f99c1b20f76341d2eb54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 5060 bytes
font_01_sfnt_off00007b62.bin
95ecbf115fa2c84c515debde24f35cb22b831f15e6e1878fa0a7d9f8a55d8fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B62 9836 bytes

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