Malicious PDF — malware analysis report

Static analysis result for SHA-256 453b9ac05b8ce668…

MALICIOUS

PDF

75.6 KB Created: 2020-12-25 11:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efe523e3d59273c7d5a6cb8fafea10c3 SHA-1: 18b1d69fe13a1162c6aa9ac2939c81a174d376e4 SHA-256: 453b9ac05b8ce668f344ebf30cd305d11bad733a0886e3a76dee38aa59bebbd1
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://gettraff.ru/123?utm_term=why+are+firetrucks+red+meme'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=why+are+firetrucks+red+meme
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f8bf69dc66a5.pdf
    • https://cdn.sqhk.co/pujapipiwat/cgdgghx/radio_italia_app_per_android_phone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bitizopovopaso/28262294756.pdf
    • https://s3.amazonaws.com/henghuili-files/pet_adoption_form_template.pdf
    • https://s3.amazonaws.com/tadovu/jutokareziwi.pdf
    • https://s3.amazonaws.com/tetenifeme/chilly_cha_cha_line_dance_step_sheet.pdf
    • https://s3.amazonaws.com/fajeloninesitel/ripaxasutelafofixezonek.pdf
    • https://s3.amazonaws.com/fogibi/driver_avermedia_c725b.pdf
    • https://uploads.strikinglycdn.com/files/9bc10d06-d5f8-4fd2-a0e0-587469e6d206/vepanugonogon.pdf
    • https://s3.amazonaws.com/vixuwogetiv/vokulezirasox.pdf
    • https://s3.amazonaws.com/rorives/mituzevigevenep.pdf
    • https://s3.amazonaws.com/wupiwupiwot/93707252399.pdf
    • https://s3.amazonaws.com/kasuwevovog/ronilapaziko.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_off0000d053.bin
11a85ea7072ffaab12b310b53c3a64f3c328904eb813e5ac4afd5511bac54be5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 5408 bytes
font_01_sfnt_off0000e2a4.bin
f8f33129dcb7c8fd51d4236fb7e5c1e19c0ff7896f2749486bd68fe5379b065b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 10784 bytes
font_02_sfnt_off0001072c.bin
1049fdbfc99229b8631255d96e83ba082bbc54caa3e2f850a05922fa8da42a7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1072C 17704 bytes