Malicious PDF — malware analysis report

Static analysis result for SHA-256 963750fb5a326db1…

MALICIOUS

PDF

67.0 KB Created: 2020-12-07 08:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8d854a196e654364e1652ab32a257dbd SHA-1: 7912720a2105c2615eb73edf7910ac75e9095ebd SHA-256: 963750fb5a326db11d97baeeadbc138af7b0fb93e83f0e0f1bc048829cdf7514
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/aws?utm_term=fasting+blood+sugar+test+guidelines'. This indicates the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/aws?utm_term=fasting+blood+sugar+test+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5fbf15884e68b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5fbed9503d629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5fbde5e6dda89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8df341c545e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5fa58cad74954.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/senodiw/23636106472.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72b42778af068263d134c/t/5fcdc9e1e43f2b00a8c94f56/1607322088173/kazofipo.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/best_video_player_for_ubuntu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b633d26ff1194f72bba3/t/5fc22d2be6d49a06bbdb92d8/1606561067956/maviwamakisipuxus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06cfc27a199023ab2e458/t/5fc34e693f75b166433e648a/1606635115918/bomikuniga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5720fc6229360eccb86af/t/5fcb21001880ce05e845e719/1607147776365/ricetta_caponata_con_peperoni_e_patate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50667b7-7995-4421-91f5-9d646accfb68/dilbert_calendar_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/95682591204.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_off0000cba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA8 5088 bytes
SHA-256: 65f491543cb3d99f0a84bf520eca71f60c8cd88289c091b13c1890f17749c57e
font_01_sfnt_off0000dcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFA 10020 bytes
SHA-256: f98aa3d8a041f5cdd20390e9d86c71e116caf7e6b19312f67ce342da49a717ee

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