Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2270d614ca52f9f…

MALICIOUS

PDF

43.9 KB Created: 2020-10-28 08:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5844eaa08d63191648eabd60543079f0 SHA-1: dcc1c4fb65c995183d456b4b13a499a9936b2d79 SHA-256: d2270d614ca52f9f5ac8137cb80f7a509cbf6b44cd3201bae83cde8ad3dede2b
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 'cctraff.ru'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many of which are benign but likely serve to obscure the malicious one. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure for users seeking free downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=midgard+campaign+setting+pdf+free+download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/vikanemepazid.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/english_grammar_book_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/difference_between_speculation_and_hedging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b894ea4-8127-4ed9-b8eb-580dd8c2cf3f/20693384076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2564/7784/files/spring_2020_career_fair_gmu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/podiresibozotadubozaduzel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6988/5601/files/internship_report_sample_accounting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398d1f95-f77a-4379-899e-790411ebe899/dijasafuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d075ab8-b30a-43c6-9ddc-b83f84870599/30926231860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5b300f-2044-4f7e-994a-2246c96f542c/34847236719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a96fc4d-c095-4c08-8245-959a95c3e36e/loruvevigasutomadasadonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/dear_sir_madam_fire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/44320240002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9837/3015/files/an_introduction_to_project_management_sixth_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3699/5495/files/apk_apps_for_roku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/gowibiwepoxagala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/temple_run_game_free_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0390/4676/files/physics_question_bank_for_neet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5289/9231/files/passing_by_langston_hughes_theme.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_off00006a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 5572 bytes
SHA-256: 36eff9e9c0c9d344c37a88acacf8484456ea5316bc24cf7d078fd0a6b4e0f8c3
font_01_sfnt_off00007d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6C 10776 bytes
SHA-256: 011f1d034635ea755470d21022e1baf459865bb0d0848f981d235e4f01893495

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