Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb1068860600ae7…

MALICIOUS

PDF

45.1 KB Created: 2020-10-09 05:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90842d26b63c84630e3e5543bbf65831 SHA-1: fc51708ccac33c7a24adfade967588d090e4dc41 SHA-256: 9bb1068860600ae754a8978b584e857a438aa63a6f219bf3260b1939e6e1a46e
184 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to disposable hosting and redirector infrastructure. The primary malicious link identified is 'https://gettraff.ru/pify?keyword=johns+hopkins+nursing+evidence-based+practice+model+and+guidelines+%25283rd+ed.%2529', which is likely used to redirect users to further malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector and link farm.

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/pify?keyword=johns+hopkins+nursing+evidence-based+practice+model+and+guidelines+%25283rd+ed.%2529 In PDF document text
    • http://files.caringwithoutboundaries4u.org/uploads/1/3/1/8/131856646/metisifitin_borematuxik_kunibebuje.pdfIn PDF document text
    • http://jikon.behinddallas.com/uploads/1/3/2/3/132303301/benekubizi-wuderixuvut.pdfIn PDF document text
    • http://jaketafa.hairymosquito.com/uploads/1/3/0/9/130969690/bofoz.pdfIn PDF document text
    • http://nodol.teamtowpathroadracing.com/uploads/1/3/2/6/132696147/c9c2d1.pdfIn PDF document text
    • http://suwav.faithbaptistkirksville.org/uploads/1/3/0/8/130813650/2299016.pdfIn PDF document text
    • http://files.berkeleywellbeing.com/uploads/1/3/2/6/132695280/6966365.pdfIn PDF document text
    • http://files.globalsry.com/uploads/1/3/1/4/131483266/xofatugiti_gokupi_javegilabanolu_vufejufo.pdfIn PDF document text
    • http://fodokar.packerintersections.com/uploads/1/3/0/7/130740596/9482351.pdfIn PDF document text
    • http://files.amypainter.com/uploads/1/3/1/4/131437924/934172.pdfIn PDF document text
    • http://figenipe.ddjohnsonassociatesllc.com/uploads/1/3/0/8/130814579/1931964.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2e81886e-fd5f-4c58-98f6-546e17b1ff03/54135274112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8571/6392/files/15061467804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6724/7258/files/52143217935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0956/3035/files/kaluge.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 6004 bytes
SHA-256: 47a7b7564a4d6b2faeb86ccbdb3b0a66ae94feb35b44a21981b92a850b538864
font_01_sfnt_off00007575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7575 10136 bytes
SHA-256: 8a6b4afb42d17157f3e02bff538bfb48ff49c0dea51320f47f9bd7ec5f11e225
font_02_sfnt_off00009831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9831 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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