Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff5a4f8c3ee5e96…

MALICIOUS

PDF

43.0 KB Created: 2020-10-07 09:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a903ee2c45f11a8bd12ac5e391117dbd SHA-1: 577e612869ae13ed14731e514ba3831084f30ec7 SHA-256: 2ff5a4f8c3ee5e9645f2f8c84c73d1d979cd2495d8e3f4b7da0dc752c0c88353
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text suggesting a lure related to 'current affairs PDF', aligning with the malicious link's purpose. The presence of a link farm further supports the intent to drive traffic to external, potentially malicious, sites.

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=affairs+cloud+current+affairs+pdf+20 In PDF document text
    • http://kebif.u3ahavelocknorth.com/uploads/1/3/1/4/131407408/besef_kovezijezedo_jubazopefoz.pdfIn PDF document text
    • http://solenigik.actionsforhealthcare.com/uploads/1/3/1/6/131606490/3464707.pdfIn PDF document text
    • http://files.ekshrine.com/uploads/1/3/2/6/132681586/d340e6dde38b59f.pdfIn PDF document text
    • http://files.batrssocal.com/uploads/1/3/1/6/131637056/sifirijuvodopagakur.pdfIn PDF document text
    • http://jozowudox.jeanbarrettpetphotography.com/uploads/1/3/0/8/130874388/8a678.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/9d17593e-43bf-46bc-93b1-349aa6621a49/39502134766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2f9457-c7b3-4d28-bb46-076019d14a49/80516922409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ad7816-3dc6-4345-8f6a-260bf9de9735/16748306230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/saavn_pro_cracked_apk_6.0.6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0958/0967/files/neopets_user_page_layouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cc8dad-ef0c-43ba-84db-c7658f8a2913/75512451522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863b4275-34e0-4e1b-9640-b28bd2be6ff5/98967125212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f948de3-2170-4a16-b1f9-4ac248da38d3/xetaralugopuvirupenogo.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_off000067e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E2 5412 bytes
SHA-256: 30634e053bbd84dae07547eb1ad44fe0367a85faac3bffc9316b44b46fc78e1c
font_01_sfnt_off00007a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 10760 bytes
SHA-256: cd1bb05e7b9acd85d16ec002145c47617dd1b907fa2896a882cc688f0867265d

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