Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfb1a4d194f1c66…

MALICIOUS

PDF

38.0 KB Created: 2020-09-12 21:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 430f33a6a14bc00cc5e75962b1775d16 SHA-1: 3ad1458773744e5207102bdf1c97627978ec89a7 SHA-256: cbfb1a4d194f1c66dc02dbfac04856ed044f8cce36f7fb639b8c469d893c0b1a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with several pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to host a large number of external links, likely for SEO poisoning or to distribute malicious content. The presence of a redirector URL suggests an attempt to obscure the final malicious destination. No scripts were extracted from this sample.

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/pify?keyword=sharp+aquos+lc-65le654u+manual
    • http://files.kaylaschmidt.com/uploads/1/3/0/7/130739093/ruravotodafuvo.pdf
    • http://files.vailvalleybaptistchurch.org/uploads/1/3/0/7/130776779/lamobuzonuxi.pdf
    • http://files.childsafechildproofing.com/uploads/1/3/1/3/131380337/5633925.pdf
    • http://jovetoj.townofolathe.org/uploads/1/3/0/7/130738755/23e6715.pdf
    • http://fegusub.atouch-ofhealing.com/uploads/1/3/0/8/130813747/3969375.pdf
    • http://siraroge.rice-military.org/uploads/1/3/1/3/131379379/mewofu.pdf
    • http://files.chambersinsurance.org/uploads/1/3/0/7/130738978/4670017.pdf
    • http://ganaz.procreditsol.com/uploads/1/3/1/3/131398560/wanisegudisu-kopakig.pdf
    • http://vaxajun.trulymedium.com/uploads/1/3/2/3/132302921/7325384.pdf
    • https://cdn.shopify.com/s/files/1/0456/9143/7215/files/purpose_of_a_template_strand.pdf
    • https://cdn.shopify.com/s/files/1/0463/1232/5285/files/fuxim.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/99368521327.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/godzilla_king_of_the_monsters_2019_f.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/brother_printer_not_printing.pdf
    • https://static.usrfiles.com/ugd/a43ec6_d228fc303ac14a95ae8acce8ddc3370a.pdf
    • https://static.usrfiles.com/ugd/66c878_a5132516097d4dee8f627e11a5a9b896.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_off00004f42.bin
e2729a097aeed3ee06aed57bcff29a000a5443bf4fd90a27324b3d596c99e23f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F42 5800 bytes
font_01_sfnt_off000062ea.bin
ebc25fa3ade188e980978e56718ab1632f143b8c1b30adaacde8a7f4aebffa17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 12688 bytes

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