Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef3c6a5b6548059…

MALICIOUS

PDF

38.5 KB Created: 2020-08-24 09:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e2ec5ba06f1e1e1ac51994ebcc1106 SHA-1: 38b5aa014f9b9b978a3cb94d9953ae26d5a5017f SHA-256: 6ef3c6a5b6548059391a419c8776195783d533e11911668b3eef3aac90e7d07e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The primary malicious link identified is `https://ttraff.cc/pify?keyword=choreographic+forms+meaning`, which is flagged as malicious redirector infrastructure. The document's structure and the presence of numerous external links suggest an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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.cc/pify?keyword=choreographic+forms+meaning
    • http://zajura.amythecrittersitter.com/uploads/1/3/0/7/130776737/nerusebudigen.pdf
    • http://rotada.deinehandwerker.ch/uploads/1/3/0/7/130740062/61c0f507.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/cambio_climatico_libro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/liwaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/blockhaus_stuttgart_speisekarte.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/anonimo_veneziano_stelvio_cipriani.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/algebra_1_eoc_test.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/83163086662.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/ketobafevuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/23948769678.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/arrhythmia_book.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_off00005935.bin
7224bf88a00848cf94101d8a3349e15e2917ec07eb126d3f9bfe35fb7dccd00f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5935 5304 bytes
font_01_sfnt_off00006b23.bin
e7ceda5bcfed6bbc046ad8340611066954938be010f5b2df28e5538fba0b0783
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 10192 bytes