Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87541b45a8ec7c4…

MALICIOUS

PDF

38.5 KB Created: 2020-09-19 22:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a46dd96bc8e38fb0e11d8876ab2f4f SHA-1: 574edfb21d03b7b6a6f11c150f73f56333a7349e SHA-256: f87541b45a8ec7c46e9d5e9a3c9bc1cc7c1bb43dad444212cb98f10cf90ad038
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely used to funnel victims to malicious content. The document body, though partially corrupted, contains the same search query as the redirector URL, suggesting a lure to a fake educational resource.

Heuristics 3

  • 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.
  • 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.me/wix?keyword=go+math+2nd+grade+chapter+10+review+test
    • http://files.themutedglamourist.com/uploads/1/3/1/6/131606222/dowedifojezine_tujub_tisitem_napitudex.pdf
    • http://files.thepurposedathlete.com/uploads/1/3/0/7/130739379/9349001.pdf
    • http://files.flexgridtech.com/uploads/1/3/1/0/131070009/rupoxamofafuruka.pdf
    • https://cc3048b7-8cae-4014-ae80-fe817f336346.filesusr.com/ugd/bc84a3_4c08a160fc4b4eec8e11bd0410263991.pdf?index=true
    • https://5206f62b-af60-44d7-9276-d59ed867bf8a.filesusr.com/ugd/ee4d88_6b5ad47c3a7d47d7914c44cd44b29ca1.pdf?index=true
    • https://82e304a9-7e00-451c-9902-af28f557ae58.filesusr.com/ugd/828753_a1a06deed6ce4a82b79b922979f2c112.pdf?index=true
    • https://ae0b41ce-d88d-4942-ad0c-afe80c1e0a68.filesusr.com/ugd/70c1ec_f2c1a31248a94d40aa42467a2ef7569a.pdf?index=true
    • https://ad1654b4-90dd-443f-ab69-fd65f3729815.filesusr.com/ugd/3835dd_c0c00f3757fa43e49d47eb216464b415.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/8691/2413/files/xuzarosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/beamer_presentation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/sample_rental_agreement_format_tamil_nadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/49608150681.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/20505783767.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_off0000544f.bin
b5610adc2ceeb60fb9481aca3439eb7f41ee4f9253a2c585eee9b3d385cfb982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x544F 5964 bytes
font_01_sfnt_off00006890.bin
9722633e9cee4384a6fb6b0862193ebcd587fda33e6808eb9578c6b27200cbd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6890 10792 bytes

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