Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e44af65917c8f95…

MALICIOUS

PDF

75.6 KB Created: 2020-10-02 03:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88756a819ca041784fda62e34040fde1 SHA-1: 30fcada5ec990055aff9ece0442bfb8f180e3c1d SHA-256: 8e44af65917c8f95962345ec1d5ef1065f273631dbf77e145b45fbde4111a99f
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on various domains. One prominent link redirects to malicious infrastructure, likely to serve a secondary payload. The document body, though heavily garbled, contains text suggesting a lure for downloading romantic novels, which is a common social engineering tactic.

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://ggtraff.ru/strik?keyword=descargar+novelas+rom%25C3%25A1nticas+en+pdf+gratis+sin+registro+de+forma+f%25C3%25A1cil
    • https://site-1037010.mozfiles.com/files/1037010/rixufifarezajebes.pdf
    • https://site-1036972.mozfiles.com/files/1036972/8455388190.pdf
    • https://site-1036745.mozfiles.com/files/1036745/90200519338.pdf
    • https://site-1037276.mozfiles.com/files/1037276/pinizadekaxolanofux.pdf
    • https://site-1036820.mozfiles.com/files/1036820/77759869776.pdf
    • http://files.ketone.com/uploads/1/3/1/6/131606492/betevumoda.pdf
    • http://files.ajandmos.com/uploads/1/3/2/6/132683330/d7dee8f91eded.pdf
    • http://files.mikebergenart.com/uploads/1/3/2/6/132695896/879071.pdf
    • http://bumezi.classgui.com/uploads/1/3/2/6/132695471/4706739.pdf
    • https://site-1037088.mozfiles.com/files/1037088/44871786046.pdf
    • https://site-1040507.mozfiles.com/files/1040507/66382260116.pdf
    • https://site-1036713.mozfiles.com/files/1036713/worijinowaporuxedup.pdf
    • https://site-1038830.mozfiles.com/files/1038830/63024353604.pdf
    • https://uploads.strikinglycdn.com/files/2ef31a38-7b3c-4f58-a93d-cdb9f108b034/wenapum.pdf
    • https://uploads.strikinglycdn.com/files/524b2930-ab5d-4a2b-933a-22795e90a881/38329658690.pdf
    • https://uploads.strikinglycdn.com/files/8bc7ec36-9504-46ed-bb66-cef3c91407cb/wifaworugixelewobelabup.pdf
    • https://uploads.strikinglycdn.com/files/3b8b372f-5919-4597-afe5-a4774acda073/28803784898.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_off0000e548.bin
58e5ccb462e19e9f41fd233af5d7335d35df0362251d3617be1517f7114f3ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 5768 bytes
font_01_sfnt_off0000f856.bin
ad0dc35bfc4a648e1feffadad1221d65dbc3adf9783c6df88767990a5dc9c47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 11444 bytes

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