Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a86bb7ba2a8a5af…

MALICIOUS

PDF

48.2 KB Created: 2020-10-09 11:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d7cc9b42bca9fd7a5e3e9e5f030a470 SHA-1: e3124ec37ffd3d9fa851c7c5887bbcc754244050 SHA-256: 0a86bb7ba2a8a5af9c5f9a3fed362c7611b069e932993c821d8f0c61f17eb6a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One critical heuristic indicates that a link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting a deliberate attempt to redirect users to potentially harmful content.

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.link/pify?keyword=graphing+linear+inequalities+in+standard+form+worksheet In PDF document text
    • http://xopuvad.ponderingscriptures.com/uploads/1/3/1/4/131453741/6182282.pdfIn PDF document text
    • http://files.service-lifts.com/uploads/1/3/1/4/131454523/8144723.pdfIn PDF document text
    • http://files.georgestewartartist.com/uploads/1/3/2/6/132695323/1e8a87e2a44c96.pdfIn PDF document text
    • https://site-1039187.mozfiles.com/files/1039187/2638840389.pdfIn PDF document text
    • https://site-1040325.mozfiles.com/files/1040325/sokabefamurorarokisusot.pdfIn PDF document text
    • https://site-1038614.mozfiles.com/files/1038614/79372063708.pdfIn PDF document text
    • https://site-1038309.mozfiles.com/files/1038309/dupodibatoforujijas.pdfIn PDF document text
    • http://nogafoz.decoamerica.net/uploads/1/3/0/7/130739204/25d5da7a.pdfIn PDF document text
    • http://files.haptotherapiekoningsweg.nl/uploads/1/3/1/3/131384255/8870222.pdfIn PDF document text
    • http://files.drzimmermann.org/uploads/1/3/1/0/131069860/1500599.pdfIn PDF document text
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/power_robert_greene_french.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6537/9489/files/7.3_independent_practice_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/wovizapofivariwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/fevapatimagavoxikebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2307/5998/files/74_angel_number_in_numerology.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFC 5652 bytes
SHA-256: fed91180ea863b10bec2e639c00a85c4bb7ee1bcd0969d755398ed7fade3f769
font_01_sfnt_off00008217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8217 10216 bytes
SHA-256: 8080971e491014b50f8424ebf84369904176388da858b925b2f0be95f4b3b41c
font_02_sfnt_off0000a4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FB 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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