Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e80d77290bec16…

MALICIOUS

PDF

43.3 KB Created: 2020-10-15 05:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1025df9df4145db153859b0ade593962 SHA-1: fca463a71067670db6c165ebf13ac7fc30abb861 SHA-256: 84e80d77290bec16fe523c4c7f570419a74b13217685d04bd52828f5a390995a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of an SEO link farm. The primary URL, 'https://gettraff.ru/123?keyword=four+methods+of+food+preservation+pdf', suggests a redirection scheme designed to manipulate search engine rankings and drive traffic to potentially malicious sites. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a malicious redirector.

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://gettraff.ru/123?keyword=four+methods+of+food+preservation+pdf In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/vupugove_jimaburivug_punibafoj_wuvimokitagal.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/1606460.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/9635349.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/ec145664d6118ab.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/3afa756b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f87abc6c82c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8705c2935c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f87055be4cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f874fb184b61.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/1257824.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/3721d33eed.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/joserafe.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/1/0429/1746/2182/files/61537628446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4736/6039/files/black_max_electric_pressure_washer_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4306/0374/files/in_aid_of_the_myreque_runehq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2a60a5-f6bf-4ff2-85ff-839e95cfca21/pevobizewamoduviru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29da9cf0-7b13-4090-a9d3-7657ca0f926a/ladusaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01900e2-f2c6-40b2-8810-0a8172ea1396/gamazijewisojovoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f321e6d-5ec7-4f8d-b4f2-f4cbe6a4920f/sebudaziwamexigubelumelaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a18c6e-86a4-4f58-bb92-f24fb37eb07d/83013897467.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_off00006ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC6 5264 bytes
SHA-256: 85ad80a79c0250572bdc8237358d1271e00468de5f959ee62ee2a19f1898bee6
font_01_sfnt_off00007c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C97 10372 bytes
SHA-256: dd1f0002cafa6a01984517cf6d29dfbf337c4a6e98187c9b4219c7bb2358cca9

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