Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cab7349f0f74a75…

MALICIOUS

PDF

35.5 KB Created: 2020-10-29 04:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3063d73e96d181a1456ada970a1be637 SHA-1: f7a85ea159ba3d09072a537a3ce3b1bd05790e04 SHA-256: 7cab7349f0f74a756e0ba87e37af8ad274cde0ee02c0e8e67938f64ab03127af
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, 'https://cctraff.ru/strik?keyword=latitude+and+longitude+practice+worksheets+pdf', points to known malicious redirector infrastructure. The document's structure suggests it is part of a link farm designed to drive traffic to malicious sites, likely as a phishing or scam lure.

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=latitude+and+longitude+practice+worksheets+pdf
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/vegutafekopeberadan.pdf
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/gobokavevivak.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/duweg.pdf
    • https://kawigijutugin.weebly.com/uploads/1/3/4/3/134351661/97a59eb4b58.pdf
    • https://viziwebaf.weebly.com/uploads/1/3/3/9/133999863/woped_xiroxab_dojozakavon.pdf
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f87bccbee7b0.pdf
    • https://mijelowiwiloz.weebly.com/uploads/1/3/1/1/131163856/womebesaguxepog_puvuwov.pdf
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f8cc08a490cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wujapu/27367240734.pdf
    • https://uploads.strikinglycdn.com/files/20be603f-31f0-4d7d-9e0a-69c3c8498b91/zuxitulotepisuduvejetomo.pdf
    • https://s3.amazonaws.com/zikeko/access_control_list_cisco_configuration.pdf
    • https://uploads.strikinglycdn.com/files/9cea85c5-4ebd-48a2-879d-8714b1b433e0/fenuniwupo.pdf
    • https://s3.amazonaws.com/netinuwa/47446349626.pdf
    • https://uploads.strikinglycdn.com/files/d8979abc-799f-4eea-98d6-8d617443021d/96926231121.pdf
    • https://s3.amazonaws.com/sugaguxagu/43049277575.pdf
    • https://uploads.strikinglycdn.com/files/5eb9d75d-5452-4e38-9509-ab24d72318a7/53047805809.pdf
    • https://uploads.strikinglycdn.com/files/70579094-aab7-400b-827f-8541c854cd36/boxopiwufuxided.pdf
    • https://uploads.strikinglycdn.com/files/f1bd197b-03e2-4c6d-9abc-c5377ef246e3/ssq_500_sonobuoy_reference_manual.pdf
    • https://uploads.strikinglycdn.com/files/ff620fef-a2e4-48d6-bfd9-d161289ba084/54798117479.pdf
    • https://uploads.strikinglycdn.com/files/1363f41c-91a4-47fc-844c-79fbf1a3dfbb/46301756259.pdf
    • https://uploads.strikinglycdn.com/files/71b2cf94-a31c-4799-91ab-aa40f524355f/vogeridodatarebuvize.pdf
    • https://uploads.strikinglycdn.com/files/aa93c124-049f-4fb4-8566-40ff78793856/xibadafoseram.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_off00004cc8.bin
2a38f2ad2e285e75b863391b7797bd93f5b69966621f248badcd0ddd5ac9a16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC8 5516 bytes
font_01_sfnt_off00005fa3.bin
6ba657ede236fc26073ac2db25d0ff7adaab3cf01994da35f8773b1ee294b355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 9712 bytes

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