Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c67e9d56cf5e0f…

MALICIOUS

PDF

42.8 KB Created: 2020-10-31 00:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05662406c77a1daf823d7212d20b9301 SHA-1: 11eaac415f1375f77f117a55e9ab14d7eb7b206a SHA-256: 50c67e9d56cf5e0fd59d74d0f6536f26a00bba25fd3428e6b3f2a7a50b2839bc
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com), indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to redirect users to malicious infrastructure.

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://ttraff.com/123?keyword=internal+and+external+conflict+worksheet
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f9711081d7a4.pdf
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/224315.pdf
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/jojag-tovuvagubesaj-jewuteviwaf-jibemabezivan.pdf
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/daxeratobewebipun.pdf
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/kowadusotusuzo.pdf
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f91d6afbd667.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7929630.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/mijedusovineti/76976497228.pdf
    • https://cdn.shopify.com/s/files/1/0268/7464/2605/files/livro_administrao_de_materiais_chiavenato.pdf
    • https://s3.amazonaws.com/wilugugo/exotic_food_restaurants_near_me.pdf
    • https://s3.amazonaws.com/gifiz/nanostructures_and_nanomaterials_cao.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c70.bin
9588d3e35cadddc41526d0da3880617f0f800f17c0d128cd685e1ccfc5c02f19
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C70 5056 bytes
font_01_sfnt_off00006d9f.bin
5d69c364d6efb4844ddcdec8bcbc6b78c15231ac3751e96c3b189e7dc4836aec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 10124 bytes
font_02_sfnt_off00009039.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9039 4324 bytes