Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baea73a234fcec4…

MALICIOUS

PDF

90.5 KB Created: 2020-11-27 21:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a9bf35d665f21368464783509fb112 SHA-1: 1fd6807e763c6e33ddf3507eeb20e4f34143ec28 SHA-256: 8baea73a234fcec42c48400ea1803c6d1fccd0a11fdc665ef491908ba2f12fcd
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://gettraff.ru/123?utm_term=the+satanic+bible+pdf+in+hindi'. The presence of numerous external links and the redirection to a malicious URL indicate an attempt to lead users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gettraff.ru/123?utm_term=the+satanic+bible+pdf+in+hindi
    • https://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/86ff1bef2193a58.pdf
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fb8980813dd0.pdf
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fa7c7961cc48.pdf
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5faf0147c693b.pdf
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f998a096decf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jizubisetebof/ascii_character_code.pdf
    • https://uploads.strikinglycdn.com/files/c2d5fb20-c4ab-4821-abe0-f51a8d8c3cd2/psychology_applied_to_modern_life_11th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/c6c0d043-f015-4d60-9488-55ff76a5a11e/feketipoto.pdf
    • https://uploads.strikinglycdn.com/files/76f539f6-3e3e-42cb-a673-ce3e58245b20/5304494398.pdf
    • https://uploads.strikinglycdn.com/files/b864dce9-ae10-4e5f-be98-a7167a01f281/difanawulopigamakibu.pdf
    • https://s3.amazonaws.com/kezemiradigu/dnd_human_city_name_generator.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012566.bin
4e6597d8a7402658664723d7ee92c41623d4cd955d83310159d52bd8e80d4932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12566 5236 bytes
font_01_sfnt_off0001372e.bin
847c0b086cb940f1aaa6cba42eed63f81a9c42281a657d04141d8123936c9dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1372E 11136 bytes

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