Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7f6566e5fb6b80…

MALICIOUS

PDF

34.0 KB Created: 2020-10-11 16:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3ef628930c30c0579e446ceca0c0185 SHA-1: ecbe1be7f6817d4adee999089b1eb4f555654154 SHA-256: ee7f6566e5fb6b80d62e1a6ddd1e2b866834fa186296d1d35215455c946ea748
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=the+successful+match+2017+free', which is flagged as malicious. Additionally, the file exhibits characteristics of a link farm, with many links pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicates maliciousness.

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://gettraff.ru/strik?keyword=the+successful+match+2017+free In PDF document text
    • http://files.justaskmigration.com/uploads/1/3/0/8/130874490/fenutidoxeb-kojodav-xuramip-sedemu.pdfIn PDF document text
    • http://wolix.henkpeetersarchive.info/uploads/1/3/1/4/131438860/109307.pdfIn PDF document text
    • http://wufeje.denglenntraveljunkies.com/uploads/1/3/1/8/131856772/rixebaj_banejuvux_bifolovoladurud.pdfIn PDF document text
    • http://tavanarix.kpcecala.net/uploads/1/3/1/3/131383770/kitafituvozowusale.pdfIn PDF document text
    • http://files.eritreantewahdoonlinestore.org/uploads/1/3/0/7/130738803/ffcd3d65bd08548.pdfIn PDF document text
    • http://tidoduju.crestwoodmb.org/uploads/1/3/2/7/132740865/6822199.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/1/0481/6591/2729/files/foremenolejilerexabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5834/4348/files/14585975071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/burn_barrel_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0599/5940/files/tubik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7795/2169/files/vuwipome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7562/5894/files/xulebefenawupepasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9061/2902/files/26378327435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9246/6080/files/summertime_saga_computer_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/sipizop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/11122500111.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_off000049f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F9 5476 bytes
SHA-256: be9da7ee3fe82afb0827d1a16c2bcaaa97ed668025c025bff217a13a4e2ceeb7
font_01_sfnt_off00005c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7E 9000 bytes
SHA-256: 4da18581c42dff30f53825f15c999cb4363c837418028c758f4601ed5a6d885c

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