Malicious PDF — malware analysis report

Static analysis result for SHA-256 822ea3cc372d734f…

MALICIOUS

PDF

73.5 KB Created: 2020-11-18 23:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a075b51ab973ba6a975ddb51c9eb3579 SHA-1: d63a34721563fb24bcc0c472325e20c28e4bcba7 SHA-256: 822ea3cc372d734fed3a851029493c204c4a2b1252c8fd2ef88bcc92ec0781a7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=the+girl+with+the+dragon+tattoo+2009+torrent'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=the+girl+with+the+dragon+tattoo+2009+torrent
    • https://cdn-cms.f-static.net/uploads/4480591/normal_5fb4f8b0c05fb.pdf
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5fb456e085326.pdf
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f879c17b3431.pdf
    • https://cdn-cms.f-static.net/uploads/4481406/normal_5fa66bee77ba2.pdf
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5fabcb480e4e0.pdf
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fb4ab854b4eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/291902e0-8c0a-4194-a399-f555c6cdc4ea/rowizazifil.pdf
    • https://s3.amazonaws.com/pazovugal/ecotourism_in_protected_areas.pdf
    • https://uploads.strikinglycdn.com/files/a2ad83ff-3dd0-4c27-be1a-11d4d3b9a8c4/38618686378.pdf
    • https://s3.amazonaws.com/podawakumepewez/alayo_singer_audio_songs.pdf
    • https://s3.amazonaws.com/jinabom/sagittal_hood_rupture.pdf
    • https://uploads.strikinglycdn.com/files/54777916-8ff7-47da-bdbf-5f43b524cb24/kaluju.pdf
    • https://s3.amazonaws.com/gonavo/50496232258.pdf
    • https://uploads.strikinglycdn.com/files/883086ea-d5fa-4203-a14e-85b6d1e1458f/44801977551.pdf
    • https://uploads.strikinglycdn.com/files/f402ba9e-6507-4ebe-a599-54de82ce99d0/rotoxado.pdf
    • https://s3.amazonaws.com/pujirageg/99560797607.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c92e.bin
5a93cee9feab868fbfbfcba0575f38956271002d8b5bde86df8908a2c61bb301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC92E 5380 bytes
font_01_sfnt_off0000db80.bin
c5925bdc7784370732346970c6cd19cadf73e5463dfe230630191fbc2a8d2d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB80 11080 bytes
font_02_sfnt_off00010167.bin
d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 16164 bytes

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