Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b8cb0049e54ec6…

MALICIOUS

PDF

44.8 KB Created: 2020-11-06 12:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f1f1810594a1581b573c616ac1a3e31f SHA-1: 982159b48b5e230a23cf04ee42242e24da3baa89 SHA-256: 11b8cb0049e54ec65f4fe00b9ce3b46bf10936d9490549b440e5a42084f79d63
96 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a link farm, directing users to a suspicious URL that mimics a search result. The ML classifier also flagged this PDF as malicious with high confidence. The presence of numerous external links, including one to 'traffking.ru', suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/aws?keyword=one+foot+in+the+grave+theme+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f9f2daf8b47f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f95b93637e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f9872ccd9d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5f99a0fe6679c.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/mukutud/20683248944.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/42332806914.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/centurylink_email_login_webmail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2841/files/38420296737.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/39445730679.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/delete_duplicate_photos_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/54485736642.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/3049927378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7f32ed-9371-4c89-b05f-cbbd2228480e/memorial_service_invitation_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2722/7036/files/shenandoah_county_public_schools_supply_list.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/makijodat.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/81981376731.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_off00006e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1A 5236 bytes
SHA-256: e4b918e2fd24206258383c3732895db23e08adc403d7443ee627dc98528c0a93
font_01_sfnt_off00007fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCE 11376 bytes
SHA-256: e05f430431cf5426414044456dd4c070a980532dc6582d8a68009823c1a196b4