Malicious PDF — malware analysis report

Static analysis result for SHA-256 a743bba53bbd83b9…

MALICIOUS

PDF

72.1 KB Created: 2020-12-23 23:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eddd9094fbd200c685f2a8cd0695a997 SHA-1: 1ab210681c9e5217d6b894b010d5560d57d717ac SHA-256: a743bba53bbd83b9a536f29c3f41b21d9db359bd437afb50c20518b92ea7994e
162 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=ben+10+xlr8+reboot'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the document's structure suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ben+10+xlr8+reboot In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8708a60ef90.pdfIn PDF document text
    • https://vikisoxez.weebly.com/uploads/1/3/4/7/134712259/9962289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8b0852bd412.pdfIn PDF document text
    • https://cdn.sqhk.co/dumadomizore/Sghc7bv/moxusudekafuberi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f951c2faa1db.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesumor/Jhj05FD/jugifugejakisukexotalobod.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/7878595.pdfIn PDF document text
    • https://cdn.sqhk.co/biziduwime/Ciar2kw/can_you_repost_instagram_stories_with_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443624/normal_5fe23a868a1da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_5fa45c15d89d3.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/dgejhbP/free_resume_templates_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f905bc34ba82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5085bdf2-afd7-4fbd-a14d-d7708af004c7/54896879436.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/personal_representative_deed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afad7488-d969-43af-8cce-10944b0425ec/our_lady_of_the_assumption_parish_latham_ny.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_off0000dbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD9 4936 bytes
SHA-256: 108906087d4ce2535c04390faf378c7fe6386345491c970e1539ece5130692a5
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 12120 bytes
SHA-256: 83db3e70963ac3c704ecb597fe62533ff8ea33792961e03e0a316a49036dded9

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