Malicious PDF — malware analysis report

Static analysis result for SHA-256 edec0508a2a021e7…

MALICIOUS

PDF

38.3 KB Created: 2020-10-06 12:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 156afd72ca459805119b0ba9536c913d SHA-1: 18dcb7374738eb46f11e51755f4e6cfbca021f67 SHA-256: edec0508a2a021e7390d8bdfb1836b94248701e7c70055a7bda7404b47063bec
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'matilda movie free download' and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO poisoning to attract victims.

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.
  • 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.
  • 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=matilda+movie+free+download In PDF document text
    • http://files.dbgs.org/uploads/1/3/1/8/131856646/6627064.pdfIn PDF document text
    • http://files.midwifelove.com/uploads/1/3/1/3/131383721/makorupeze-sulavire.pdfIn PDF document text
    • http://files.purplehornpress.com/uploads/1/3/2/6/132695880/wogiwalalesam.pdfIn PDF document text
    • http://files.cognet-research.com/uploads/1/3/0/8/130874097/7218103.pdfIn PDF document text
    • http://files.areaokc.com/uploads/1/3/0/8/130813851/530db.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/8f77c8d1-55a1-46e9-9b2e-567fc39ee562/40786846206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40c94ce-303d-49e1-89ce-1744e87863d2/wozisalisukos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a2469c-02bf-4c59-a776-3f164beab32f/fopaforab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53348487-d42f-4558-a335-c0725803cf1d/widotuposelud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a57dc6-9556-4d28-ac02-a66670c5dcc9/xisikadasajejovadagas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894ed5ca-0fe3-4872-8bf1-591f5e83d2ba/43768692466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1abcdc38-b7de-4a36-9dd2-b9ccb997fc62/22109026237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6902cd2f-17ba-4813-9b1c-0fa00bd1a15b/fesepekaxigozodezokoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b042ddd-1f40-4a4b-8299-14a271febee8/bevugadosumofegug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9233/9616/files/butane_soldering_iron_lowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8866/1666/files/the_kite_runner_project_gutenberg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4983/9513/files/agent_in_place_book.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_off00005865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5865 5032 bytes
SHA-256: be55de175376330484cf1ad319a1cd30541cbc4ed49a0cb201a5c32ea23d3522
font_01_sfnt_off0000698e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698E 10028 bytes
SHA-256: 4cb9e2c889cc51f7c72de020153218ab064d1b9842b362313827c7752c6036aa

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