Malicious PDF — malware analysis report

Static analysis result for SHA-256 44386dd1e431cf47…

MALICIOUS

PDF

64.0 KB Created: 2020-11-03 08:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da8e6b51f93290eccc2759d18c4b848f SHA-1: 290f44fd5e67815ea1341a26e92f898df4d895fa SHA-256: 44386dd1e431cf47c6a97640317c1b6d3b4cecc9201f78db70a6d3d41034a143
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 infrastructure, disguised as a search result for an academic paper. The ML classifier also flagged this PDF with high confidence. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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://ttraff.club/123?keyword=fundamentals+of+soil+ecology+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f918c2bbad3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5f9fdf6980118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f998e339314b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5f8956731769d.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/kevivizasexebug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f92f94400257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f9e8857649b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/belt_of_giant_strength_cost_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c2dd00-d5e8-4458-a8c6-b6c450f984e7/jufixagozafewutititob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a487e211-2ce5-4d62-b6de-066d56dd7a29/42630674907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2d32f7-ad4a-4036-ba47-46ea363e8f0d/lugevopidibixujifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db4f3bd-bebf-467c-87ed-6f7ebf88c78b/assassin_leveling_build_maplestory_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4567/9789/files/canyon_guide_outfitters_shorts.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cd73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD73 21728 bytes
SHA-256: 1e9d77be2fc75200805e35f794e8956aba59b5e2305596d982f432fd372656ae
font_00_sfnt_off0000943e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x943E 5436 bytes
SHA-256: bd49b96764113b5fc69ec8e1542c595c982fcd5a7d483407856a0166cb852752
font_01_sfnt_off0000a6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C0 11468 bytes
SHA-256: beb20bafd6767db8103b53f5035d295cd7174675df29b90852822b1f1b3ed271

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