Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffffcf1f5be90832…

MALICIOUS

PDF

50.5 KB Created: 2020-09-17 08:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8361f25625a735de34ae57f40ee62f8 SHA-1: 91262cdbd045dcf929c255d8730223aafc451df6 SHA-256: ffffcf1f5be908329f12f410d2ddb770aa5a8394c4e4a4e872324e255b1aa489
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple external links, with one specifically identified as a malicious redirector. The document body and embedded links suggest a lure to download a file, likely to initiate a further stage of infection. The heuristic firings strongly indicate malicious redirection and a link farm designed for SEO manipulation to attract victims. No scripts were extracted, but the presence of numerous unknown URLs points to a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=ca+quebec+driver+manual+fr.pdf
    • http://files.hannah-harding.com/uploads/1/3/1/8/131856119/zukubafe-rorumopiruxemaw.pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://files.cavalierbattalion.com/uploads/1/3/1/6/131606563/budozasi.pdf
    • http://fikob.stoneycreeklabradors.com/uploads/1/3/1/0/131070420/pirebigudon.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/adding_dissimilar_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/13987035884.pdf
    • https://cdn.shopify.com/s/files/1/0457/3164/3558/files/basketball_wallpapers_hd_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8423/files/55632168741.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/82032152328.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/airplay_ed_netflix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/burmese_script.pdf
    • https://3a434b47-dd93-4176-acee-22fcf1ba2ab0.filesusr.com/ugd/7603ae_5e6d8e31ccd64a5d9adeba64900f2aea.pdf?index=true
    • https://39bbb6e9-4b6a-47cc-aee5-5c0da1402d5a.filesusr.com/ugd/067ecb_37c6f4e1bd45440d8c9573fcd5504363.pdf?index=true
    • 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_off00008668.bin
cdd55df6c9aaf36e2328068b68ad864a2495d2f274a391fc19bec4d502c21c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 5384 bytes
font_01_sfnt_off0000989f.bin
e27d4b41fb0f43e5a151596276a476407a6bb36b0eb49e37c8b6a7a55e61588c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x989F 10752 bytes

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