Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2f037d5479ecf0…

MALICIOUS

PDF

66.3 KB Created: 2020-11-20 04:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53a0275d122cdd4bb133f23f876850ad SHA-1: 1ca31376626f1c0bd2ec06477372f84b96603272 SHA-256: 9c2f037d5479ecf01ee1c413e9a8612ba13c06fa1f94077ed2996f39908bee30
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at `https://cctraff.ru/aws?utm_term=media+player+for+android+tv+apk`. It also hosts a PDF link farm, with the first URL being `https://s3.amazonaws.com/votubukaxogilix/lokawir.pdf`. These heuristics, combined with ML classification and ClamAV detection, strongly indicate a phishing or malware distribution attempt disguised as a media player download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=media+player+for+android+tv+apk
    • https://bovexojegej.weebly.com/uploads/1/3/4/4/134481742/kexitezotisebolusupa.pdf
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/vuvozisezoxi_rapadegobevofu.pdf
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f90aac750547.pdf
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5fb6ed1573baa.pdf
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fb26432ce241.pdf
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/jabezakeki.pdf
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5fa120dc20af5.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdf
    • https://feziriwavejoli.weebly.com/uploads/1/3/4/0/134096108/7a15f8552ae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/votubukaxogilix/lokawir.pdf
    • https://s3.amazonaws.com/moduxanakuri/46268759318.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/free_verse_song_lyrics.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/pink_beans_buy.pdf
    • https://s3.amazonaws.com/leteraxewe/teleribawixuzuned.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_off0000c688.bin
c16f7a96bcc423f092c85e59702b6d2aae6f06ad7cf555bf0cfabc2389fedd64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC688 5088 bytes
font_01_sfnt_off0000d803.bin
969d503d8c6b466a352743f634eed1543e92d8e69293216f14dc4c028190b0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD803 10684 bytes

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