Malicious PDF — malware analysis report

Static analysis result for SHA-256 7956c0384f5d97bc…

MALICIOUS

PDF

42.3 KB Created: 2020-10-27 15:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcdbc16badbb5d01dd7e751caaad0111 SHA-1: be02d5df22cb573c0c1cef5834ca0b7259ab44c7 SHA-256: 7956c0384f5d97bc790863e8769a9f5a80dad56cfebf2d037b51a4b42a7acc2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a link farm, which in turn hosts numerous other PDFs. The primary malicious URL identified is 'https://gettraff.ru/pify?keyword=virtual+families+2+cheats+unlimited+money'. This behavior suggests an attempt to drive traffic to potentially malicious or ad-heavy content, masquerading as useful information.

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://gettraff.ru/pify?keyword=virtual+families+2+cheats+unlimited+money
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/lufagajifuzu-pefimudeg-remomupil.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/temiban.pdf
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/6051176.pdf
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/pugamukusog_jexube_fuwoxiginor_tufuzudokumuw.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0483/8929/2184/files/35002332574.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/refukojat.pdf
    • https://cdn.shopify.com/s/files/1/0481/9648/5277/files/fepotelazemizegap.pdf
    • https://cdn.shopify.com/s/files/1/0481/8783/4525/files/26942431921.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/jinifabekufavotubajupo.pdf
    • https://s3.amazonaws.com/susopuzupure/xekexojuxikibokizi.pdf
    • https://s3.amazonaws.com/joterige/venemegulexuwidafox.pdf
    • https://s3.amazonaws.com/dudurat/kepejijowovefazawibox.pdf
    • https://s3.amazonaws.com/kavitokolezub/acta_constitutiva_de_una_constructora.pdf
    • https://s3.amazonaws.com/tadovu/jukegox.pdf
    • https://s3.amazonaws.com/fokapikow/66960005226.pdf
    • https://s3.amazonaws.com/jamokaroxoj/saving_all_my_love_for_you_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0502/7807/2505/files/xuvizowukekireboni.pdf
    • https://cdn.shopify.com/s/files/1/0499/7854/0183/files/jezokofamoxi.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_off00006660.bin
9a8c0c3e3a7801af48e644cf477c40a2112f403431d21eac138b826b0152f33f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 5460 bytes
font_01_sfnt_off000078d0.bin
9af895abf76cdd8a20eff8f3d003a5ecf5c07b56853c2ec17cddc0bf93d9147c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D0 10132 bytes

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