Malicious PDF — malware analysis report

Static analysis result for SHA-256 933d403855ab50dd…

MALICIOUS

PDF

81.1 KB Created: 2020-11-14 10:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9cbb2191f96b95943e7fb6a930aefb SHA-1: bc192887f31bda47ffd337cc3573213343876564 SHA-256: 933d403855ab50dd4ad7a57fd32cd68358c6eba4ae1e4f81273f6189b65dfd1e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, https://traffking.ru/123?utm_term=poo+tee+weet+meaning+slaughterhouse+five, suggests a potential SEO manipulation or phishing attempt. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=poo+tee+weet+meaning+slaughterhouse+five
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f933f81b4f2c.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdf
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8f76061b5fe.pdf
    • https://bujugerevik.weebly.com/uploads/1/3/4/6/134677448/dekivujuxo-nikavixozexola.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5fa916a81e396.pdf
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f9b47b685a5f.pdf
    • https://xowiwatodilesa.weebly.com/uploads/1/3/4/3/134363744/6523297.pdf
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f8d02977b5ba.pdf
    • https://nixoferijoxe.weebly.com/uploads/1/3/4/3/134373865/8838484.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/58c155c7-7264-42cd-9af5-090e9c8078fe/master_of_orion_ship_design.pdf
    • https://s3.amazonaws.com/paropabaru/kosuroludigozimipev.pdf
    • https://uploads.strikinglycdn.com/files/93a918b0-8afa-44da-b6bd-c6499fcccb14/24188063355.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010319.bin
c721983c3ed15373a41ff4b55790287c3dcb5e893fece00c47da98e3d208e4f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 5336 bytes
font_01_sfnt_off00011529.bin
30145880c2363403659e04e099f5cd4ffc77f88895df777a14df97a9debc0a37
pdf-font-stream PDF embedded font (sfnt) at offset 0x11529 10088 bytes