Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ae6683a6a621b7…

MALICIOUS

PDF

38.2 KB Created: 2020-08-24 16:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c78f393a68ce9c2ed7b5192239b48410 SHA-1: e54f8de65f543334fb97f73912340a345023d091 SHA-256: 24ae6683a6a621b70425d28ba1f7fc0ca1df63f5eb453168d6c70043a14fe43b
152 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially garbled, mentions 'Xiaomi smart android tv box 3c' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the 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.ru/pify?keyword=xiaomi+smart+android+tv+box+3c
    • http://files.mgle-germanschool.org/uploads/1/3/0/7/130740165/07b4b7e10b.pdf
    • https://cdn.shopify.com/s/files/1/0440/4848/2454/files/79546445709.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/mumipijuxetaresorok.pdf
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/hisd_school_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/minecraft_halo_mod.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/626380920.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/bitsat_previous_year_question_papers_with_solutions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/60886859160.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/12620956297.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/41622631878.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_off00005815.bin
596bf941d288356fa994edc7baf40031dd7244a87d543488c74d5c5f76726320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5815 5464 bytes
font_01_sfnt_off00006a8f.bin
363007b633a3555a38045ee8f8efa75484c5b95caf13c5d42fb6e8d773200e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8F 9904 bytes

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