Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a209fc80ad1e30b…

MALICIOUS

PDF

26.0 KB Created: 2020-11-04 08:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15099bbb197eedf41d5dcf1de67d8781 SHA-1: 372d51bf2ece81772a13192018a5307c5eb1e04b SHA-256: 7a209fc80ad1e30bf99e1c6ff1bd4e5233e156e962d9f779b6fb508a9ca5faf4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many pointing to external resources, which is indicative of a link farm or SEO manipulation tactic. One prominent link, 'https://ggtraff.ru/aws?keyword=vitamin+sea+fishing+nj', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that aligns with the malicious redirector heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/aws?keyword=vitamin+sea+fishing+nj
    • https://suranetu.weebly.com/uploads/1/3/4/4/134458043/1959093.pdf
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f8a318a5b9ce.pdf
    • https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/vazigaruvipirumote.pdf
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/3065786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetare/rainbow_rowell_attachments_download.pdf
    • https://uploads.strikinglycdn.com/files/173a9e44-72d8-4fd6-8527-7fa2b383947d/26387777058.pdf
    • https://s3.amazonaws.com/nawuvud/the_eyes_of_nye_pseudoscience_answers.pdf
    • https://uploads.strikinglycdn.com/files/2f734b7d-6767-498b-bac6-82e472c70861/54182861519.pdf
    • https://uploads.strikinglycdn.com/files/fb627a04-4c75-4515-a69f-160e10437d82/paleolithic_and_neolithic_age_differences.pdf
    • https://uploads.strikinglycdn.com/files/0fa44ded-0882-498e-ad7a-98d042493949/4323992540.pdf
    • https://s3.amazonaws.com/subud/jadobidiwowirakuxamiratop.pdf
    • https://s3.amazonaws.com/bejeseja/godagiresu.pdf
    • https://s3.amazonaws.com/gotenukevepunin/blessed_assurance_hymn_chords.pdf
    • https://s3.amazonaws.com/zetare/cadena_de_valor_ejemplo.pdf
    • https://s3.amazonaws.com/kavalukato/pdf_file_to_jpg_converter_software.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ee5.bin
716aa6a30b77ebbe4057b33ad8d135b7097223dca4abf9b6b20b37454a0250e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE5 5092 bytes

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