Malicious PDF — malware analysis report

Static analysis result for SHA-256 b186fd6647f90de4…

MALICIOUS

PDF

47.0 KB Created: 2020-10-09 03:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3edf86bdb2eaa79edb19068420526809 SHA-1: e6c07cd134f66cdef4f5b4481764834c6b003e25 SHA-256: b186fd6647f90de4d8e696e5acdc7ecca6ac8af3013b5dfefdac7c3a2cf15067
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding numerous URLs that redirect to potentially malicious content. The primary redirector URL is https://cctraff.ru/pify?keyword=how+did+petruchio+treat+katherine, which is flagged as malicious. The document also contains a large number of links to disposable hosting domains, suggesting an attempt to distribute malware or phishing content through a wide network of sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=how+did+petruchio+treat+katherine In PDF document text
    • http://pidobi.theforesightcoach.com/uploads/1/3/1/1/131163943/671b9e9d5.pdfIn PDF document text
    • http://files.fiatclubact.org/uploads/1/3/2/7/132741272/539182.pdfIn PDF document text
    • http://files.mattiegraceboutique.com/uploads/1/3/1/8/131857152/6601197.pdfIn PDF document text
    • http://masisijox.sgfbeef.com/uploads/1/3/0/8/130874592/tufafotekotumob.pdfIn PDF document text
    • http://kekipala.lighthouseontheprairie.com/uploads/1/3/2/6/132683403/1428458.pdfIn PDF document text
    • http://files.ywamchiangraibase.com/uploads/1/3/1/6/131636644/3466766.pdfIn PDF document text
    • http://fobizas.operationimagination.com/uploads/1/3/2/6/132681311/c0e587.pdfIn PDF document text
    • http://pogutip.ajbuilding.net/uploads/1/3/1/4/131414661/9477652.pdfIn PDF document text
    • http://files.uthrive-in-unity.com/uploads/1/3/1/4/131437919/zurorerafode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2420/5982/files/proform_exercise_bike_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2199/2599/files/51981101635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/dda_regulations_scotland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f869f5-81a1-47b9-aeae-5717130cd3f1/95770635638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee637ce-03ba-4f5a-92ef-936091f8da67/43570542436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6dc5e2a-ffc3-47cb-a71e-5b33b7a76daa/zesufa.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_off00007a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A90 5068 bytes
SHA-256: d1d69101bdd2a2744c70dd4053340b4461b0dbaba23b366e52cdc1d0a2b7d36e
font_01_sfnt_off00008bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD9 10340 bytes
SHA-256: dd8c7510163a140fe8bbc217b13ac6ee398635e04d6145caee4dae283201a141

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