Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7a99b74511245b…

MALICIOUS

PDF

38.6 KB Created: 2020-10-04 16:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bbc15f335c43ab1dddab065c42e3065b SHA-1: eaf66eabfb2e2acb8e34e446f0721d993e0a33d4 SHA-256: 7a7a99b74511245bdf0a611f51a7540ecd2a98fb9488894244c4fadaf63313e7
184 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of embedded links, many of which point to suspicious or known malicious redirector infrastructure. The document body, though partially corrupted, contains references to these URLs, suggesting an attempt to direct users to potentially harmful sites. The presence of a malicious redirector link and a large number of SEO-style links indicates a campaign likely focused on traffic redirection or hosting further malicious content.

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/strik?keyword=simbologia+de+soldadura+segun+aws In PDF document text
    • http://files.markgordonglass.com/uploads/1/3/1/6/131636654/3013826.pdfIn PDF document text
    • http://fozufix.theprospike.com/uploads/1/3/0/7/130776533/linirokimus_sutegoje_jotapabix.pdfIn PDF document text
    • http://resejifek.orendagametables.ca/uploads/1/3/1/4/131407921/822643.pdfIn PDF document text
    • http://files.shoreexcursionsambercove.com/uploads/1/3/2/6/132695401/xisig.pdfIn PDF document text
    • http://veluli.leachfamilyfarms.com/uploads/1/3/1/4/131407164/ziwesopasimuxu.pdfIn PDF document text
    • http://vejomami.redheadyogini.com/uploads/1/3/0/8/130874411/mojigodiwalatu-sudewoteguvigus.pdfIn PDF document text
    • http://fijaso.oakstreetart.com/uploads/1/3/1/4/131410685/kiwikoz.pdfIn PDF document text
    • http://files.miamibluebullies.com/uploads/1/3/0/7/130739490/wexegupozadunut.pdfIn PDF document text
    • http://files.salinaseminarseries.org/uploads/1/3/0/9/130969937/towosamaz-lukilapazabima-nusujuwol.pdfIn PDF document text
    • http://lolerefi.purepointacu.com/uploads/1/3/1/3/131379578/5620710.pdfIn PDF document text
    • http://files.valuesclarificationclass.com/uploads/1/3/1/3/131383456/dameka-badusuvoj-betif.pdfIn PDF document text
    • http://vuzivupuz.flowersbyalicia.com/uploads/1/3/2/6/132682233/2586845.pdfIn PDF document text
    • http://files.sam-miee.com/uploads/1/3/0/9/130969075/sabipofudukakosu.pdfIn PDF document text
    • http://duleju.sunburylionsclubofohio.org/uploads/1/3/2/6/132682646/3957238.pdfIn PDF document text
    • http://tezigigot.davidcunninghampolisci.com/uploads/1/3/0/7/130740514/lowurupujusuvo.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/1/0488/3857/4245/files/momudijexonazobiwivogane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5573/7753/files/67707408067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4543/5030/files/gordon_ramsay_knives_set.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_off00005745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5745 5480 bytes
SHA-256: abb47ac1410582be7bec842320a5427465bbce1035a1dabc4e1207a38ed9579d
font_01_sfnt_off000069d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D2 10436 bytes
SHA-256: a4e1bc37f2cf95b650116ec43217a4ed52b7134741603a95314f2c9b21399483

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