Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccbcb872ad35a80…

MALICIOUS

PDF

72.0 KB Created: 2020-12-27 08:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1763ec6c2e32c2368cc845e404acf1b2 SHA-1: c679f783dce5cfb4767106f7a5137aa169027204 SHA-256: 6ccbcb872ad35a807b72c3f2719b2de8f6fa7e437038f76665060ac896358dce
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://traffmen.ru/aws?utm_term=atlantica+online+deutsch++vollversion` is identified as a malicious redirector. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains text related to software downloads, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/aws?utm_term=atlantica+online+deutsch++vollversion In PDF document text
    • https://cdn.sqhk.co/forokuxodel/dBgghdx/bowling_techniques_for_beginners_cricket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5fa80cfed8ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f8c16021881c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422918/normal_5fad43b6e1506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_5fd7daec96ee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5fba09da693bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5fc8779ecd0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f94a3c307850.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/KEdjcol/paul_hardcastle_songs_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daxemo/59496603085.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/chak_de_india_dance_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb8c2f6-2b79-4553-9a81-aa5a8bda0aa6/guilford_county_inmates.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/vovomujazememe.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/jabavimijorubujebogoxavib.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/modern_chemistry_chapter_9_stoichiometry_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/xofubojime.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 5076 bytes
SHA-256: 03ed9277dab6279e3a128cb9f46435d4d19701121c5fc36c74c3def9bdf5b5a5
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 11008 bytes
SHA-256: 2eaf68ada68a239316e3f5c64790af82fed39c7bc1d463797f7793e6ab8a02b5

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