Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b61a7ffd45dbe15…

MALICIOUS

PDF

37.6 KB Created: 2020-11-04 09:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 14b27a2974f07b2bd211823f383e1345 SHA-1: 387720304309d409d856254ea729bd188e28d044 SHA-256: 0b61a7ffd45dbe156d88958d1e5ff807cd76019ba8252e5b35e8c13615ce7969
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a 'free popcorn time apk download'. This indicates a lure to download potentially unwanted or malicious software. The document also contains a large number of external PDF links, suggesting it is part of a link farm designed to improve search engine rankings for malicious content. The ML classifier strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?keyword=free+popcorn+time+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f96475a6f22c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5f92854761834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_5fa2541b3010e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5f992da179e04.pdfIn PDF document text
    • https://turamidiwirak.weebly.com/uploads/1/3/4/3/134340523/5bca5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f88c92a539b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/18087802104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3955/3193/files/50568849253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aff910f-fc6c-4b7e-a073-2b0200af6bb7/one_proportion_z_test_ti_84.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cd9ec4-1308-4b81-b462-832fb4bd23f4/lojezibanizakemix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f183d833-f6f5-469f-9188-82ce2f95139d/savalefejumelewemujuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/adjektivdeklination_test.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/pugojokexelolosez.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_off00005593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5593 5152 bytes
SHA-256: fa3c3c89797165f7a065f4766e9f9f3a352203c18c2c64984d195af011015496
font_01_sfnt_off00006718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 10212 bytes
SHA-256: e8e0a1a4e9f360150da437ecd5b4a71a6cf1b05555b9671b200d79c2662b735a

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