Malicious PDF — malware analysis report

Static analysis result for SHA-256 85331fe6b2794000…

MALICIOUS

PDF

217.2 KB Created: 2020-12-15 04:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3e56f10b262596c538483e153907c490 SHA-1: 0acf2f7295656af1c354a39941e5a350d98c65b0 SHA-256: 85331fe6b2794000d57f87a03c5b939625df2ae4de763d0e4a57bfe5aaa41593
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 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download a secondary payload. The document body appears to be heavily obfuscated or corrupted, preventing analysis of its direct content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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/123?utm_term=wikipedia+manual+of+style+article+titles In PDF document text
    • https://pojozuwowate.weebly.com/uploads/1/3/4/6/134631913/ruxapewave.pdfIn PDF document text
    • https://memagakotis.weebly.com/uploads/1/3/4/7/134760483/buxodazixej-mezijosat-fomarumit-zajaforirefov.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/xewamejixolefaj/kududavisuvivax.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144361c8c7413143450ce/t/5fc5c7eb3f75b166439cba7f/1606797295059/twilight_breaking_dawn_part_2_putlocker.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50a6fc30a162e0c6d1fcc/t/5fd60206154d727871e123b5/1607860743598/53205849373.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a59a3dfdd95b60fd26c5/t/5fc77ef9788a962b7c314712/1606909692717/md_anderson_library_jobs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcecc5edeaf7179bbccf7b0/t/5fd5fc6b154d727871e0d9a2/1607859307874/cosmic_encounter_alien_sheet_sleeves.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5933e3dfdd95b60f4df7d/t/5fc7aedaa038a451bcf615fd/1606921947384/infinite_car_racer.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/asta_fantacalcio_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c63dd26ff1194f8cbdd0/t/5fcff2264e43280751309ff2/1607463462892/30688716733.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/gitunetakusumidof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56541369-4b26-4032-b63d-c29e137962af/best_website_host.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fcfca2f2564c77af024b86a/1607453234539/fewoludemalevevenur.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/mewogowuledidepafajevit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf45345ca4f7902655550/1606218835690/57598229953.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53a0ec89e1c4b8fdafd1e/t/5fc70275ad3e6411923b568f/1606877814461/freecraft_zombie_apocalypse_hack_apk.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_off00030f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F42 5480 bytes
SHA-256: 14abcd2571dcfd6e8fa06b7889b0c569950c87c9a329019fd47bf8158e330f2c
font_01_sfnt_off000321eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321EB 16644 bytes
SHA-256: 8e7cdb2fe641b354086416bdecd3e5dcc712753aa7fa8af91614185883b570d7

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