Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a16d13a21c2bc87…

MALICIOUS

PDF

40.7 KB Created: 2020-11-01 22:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9e06b7abe4fd5ce072c3da5c1b42551 SHA-1: 1358a80ee1cd6b625ba14b980abe97f11c9c74b8 SHA-256: 6a16d13a21c2bc8775483d9344f7577d154938c7fee121ea8606f7db0fbf8e6d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/aws?keyword=exploring+social+psychology+pdf
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f96bb1b0a06c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fac4001c-1e64-4937-af63-ae80c295684d/sodejo.pdf
    • https://uploads.strikinglycdn.com/files/8c702162-11d3-4b47-b615-1c0f9f3843a1/sequence_questionner_le_monde_ce2.pdf
    • https://uploads.strikinglycdn.com/files/483402c9-35a0-4ff1-95c6-f3cc74e27ae8/faveguleva.pdf
    • https://uploads.strikinglycdn.com/files/8738dadf-f72c-42ba-ae7b-15ac70d99c6e/pokemon_omega_iv_calculator.pdf
    • https://uploads.strikinglycdn.com/files/55c46f9f-359b-41f7-8763-cf433780c2e2/69895464877.pdf
    • https://uploads.strikinglycdn.com/files/62fb6f24-ffef-4683-aaf7-305d4332b86b/34953590520.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/spotify_premium_apk_no_root_ios.pdf
    • https://cdn.shopify.com/s/files/1/0498/1702/6715/files/computer_memory_units_chart.pdf
    • https://uploads.strikinglycdn.com/files/50273c2d-da18-4f36-a686-eccc21b5800e/fantasy_age_campaign_builders_guide.pdf
    • https://s3.amazonaws.com/pujinit/school_bus_license_learn4good.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cf.bin
ebfa032315bee3ba318d45c6929e590db0f8cd327984ab713c67c26d821a61cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CF 5544 bytes
font_01_sfnt_off000074b8.bin
adfbf1212d0d198229d446030225b3735a4b59749ee95177e8c05e45446107d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 9936 bytes

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