Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ee57a85ede8b7d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-22 17:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07839c33e8440db4d3f332cc15467f1e SHA-1: 109195555cb2522c23f1edc77a928d7c02caf969 SHA-256: 82ee57a85ede8b7d1cf21f94e6a108ab038395729552f3f328cc9b297338368a
154 Risk Score

Malware Insights

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

The PDF contains a lure for 'Arma 3 multiplayer crack' which redirects to a malicious URL. It also hosts a large number of links to other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the embedded link points to known malicious redirector infrastructure.

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://ttraff.com/pify?keyword=arma+3+multiplayer+crack
    • http://files.banklick.org/uploads/1/3/1/8/131857199/penulerezikipazoni.pdf
    • http://files.rosaryforconversions.com/uploads/1/3/1/8/131856743/jamakogafiza_bozalajubobivaj.pdf
    • http://fuwar.ozaukeelivinglocal.com/uploads/1/3/0/7/130775350/vitikasolimum.pdf
    • http://lewomasap.magicalgoldens.com/uploads/1/3/1/6/131637308/maroliduteka.pdf
    • http://files.jennadamberger.com/uploads/1/3/2/3/132303146/1643127.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/vugufatekefi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/61813037897.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3687/files/delivery_note_template_doc.pdf
    • https://cdn.shopify.com/s/files/1/0463/2697/2571/files/30256310511.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/64583004601.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/vugaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/18044443421.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/zeperunomobazerixaguje.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/pubevuzupazubofewuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/trastorno_de_agorafobia.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/widaked.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/ford_800_tractor.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_off00006810.bin
dd7f32d2ab902884ee062a673b49845b69411ac1220b662e9647d25298290ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6810 5220 bytes
font_01_sfnt_off000079c2.bin
11ab6ed0165d2269abefc996c9bed8eabeec520af273eb74b9774318898dc864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C2 10680 bytes

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