Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a277f76c7eb5e3…

MALICIOUS

PDF

72.1 KB Created: 2020-12-19 04:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0686cf180b12c020ac55ff0a1fad050f SHA-1: 2d5976431ffd90ed47186c61e544cd0f62bf29b6 SHA-256: 80a277f76c7eb5e3c382803730c5e5e724b38087b78c2326fa47de611c6cfa49
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://cctraff.ru/123?utm_term=animal+like+protists+classification'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or redirection attempt to a malicious site, likely delivered as a spearphishing attachment.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=animal+like+protists+classification
    • https://cdn-cms.f-static.net/uploads/4480893/normal_5fd86233bc658.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f9a16a961738.pdf
    • https://cdn-cms.f-static.net/uploads/4422659/normal_5fa9ce6c1dddf.pdf
    • https://cdn-cms.f-static.net/uploads/4455881/normal_5fdbc4ab43c3a.pdf
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f8a77728a62e.pdf
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fbddc9ef0c69.pdf
    • https://static.s123-cdn-static.com/uploads/4417426/normal_5fdd1a99a0386.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc2c2dc1452f90b7ff143cf/t/5fcf364a1b45e152edc2c5c1/1607415370942/gsmarena_pixel_4a_xl.pdf
    • https://s3.amazonaws.com/nefomojuwet/buduwizi.pdf
    • https://static1.squarespace.com/static/5fc5c410bdb33045eee38129/t/5fd6def213a48350e82526ff/1607917299646/vofexogoler.pdf
    • https://s3.amazonaws.com/tetazino/78136521522.pdf
    • https://s3.amazonaws.com/befafuni/office_for_mac_2019.pdf
    • https://uploads.strikinglycdn.com/files/7c2c0421-aa1a-4ad8-a103-87e0eb37e0eb/bridezillas_season_12_episode_4.pdf
    • https://uploads.strikinglycdn.com/files/1f73ff65-ef5c-4840-b7e5-58de6289956e/78253900501.pdf
    • https://s3.amazonaws.com/fadedosi/balewakolom.pdf
    • https://s3.amazonaws.com/bulozor/nilareditej.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d229.bin
c3229cb6414cf9415ab0d3620975e4ee319a4c00f875924967aca36973d52569		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD229 5000 bytes
font_01_sfnt_off0000e2fe.bin
912c6abda4cce6b91b937a1662428d9b53ec7f254a0a54fa37905ad4b52c145d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 10068 bytes
font_02_sfnt_off0001052e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 4324 bytes

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