Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68c607811be6e2f…

MALICIOUS

PDF

44.7 KB Created: 2020-11-09 14:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5ed82650c30d8994f7edef853720f390 SHA-1: c5581efa11cc4425f4b744c82e5952a05eedccfb SHA-256: d68c607811be6e2f608fa9feef36f6272c553b185b967587d3314dff25d2779e
102 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?keyword=google+settings+app+download+android+apk'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier also strongly flagged this PDF as malicious. The presence of a download button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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?keyword=google+settings+app+download+android+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f94599778ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f8820db1a0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5f9e7e70ee272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8fa235539e3.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/bef6e843-52fe-4271-9238-aa2a3da85443/dulajasekadi.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dovodijogipoxomitositen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b470751-de8a-43da-9cea-d911e4db6603/layunin_ng_broadsheet_at_tabloid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fc2af5-0b7e-443e-86d7-b4e5d16b9544/zorich_mathematical_analysis_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kesonifexebijotimivuduni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3365ba87-af1e-4d29-9d96-578b9786eb3b/ladejesejaruzikezupose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a1bbd0-a232-454b-9313-b083fc51d4c2/17627549625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26ccdf2-9d95-48e3-9e9f-da0ada4a79ee/dojadila.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_off00006ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF7 5312 bytes
SHA-256: 88e79ca76cfc3e58c1b5b685505b12c3ac984ee21da60a28d388e498a180fc15
font_01_sfnt_off00008235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8235 10424 bytes
SHA-256: 459360edb6d78a03314202a2fcea032ab2f0061bef4527e856c9d227ebfcd221

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