Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a92f17739d35991…

MALICIOUS

PDF

45.1 KB Created: 2020-08-15 22:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5cd24b3953fbfd0956b9c0392a5fb25 SHA-1: 44ab413f8f6a26e458854a074f6a166ef9acfc91 SHA-256: 6a92f17739d3599164a3a69e5f17a9b5618accca22cbf75faeea52d046d82e8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure. The document body and embedded links suggest a lure related to 'ouvrage d'art pdf', likely intended to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=ouvrage%20d
    • http://jinoxon.fluidartcreative.com/uploads/1/3/1/4/131452937/3618140.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/composition_of_biomass.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/wuruzavojexonadubogifebin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9122/1911/files/sorting_algorithms_in_c_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/35784395146.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/26517815559.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/sql_server_stored_procedure_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/xadepijiwobivojojuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/8745391130.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/24105892326.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_off00005726.bin
0cc4ba3f6aa11f2699659b3ba338dc422c966927babe67dd2c00b90531364b53
pdf-font-stream PDF embedded font (sfnt) at offset 0x5726 4740 bytes
font_01_sfnt_off0000676a.bin
900c4f51f976cb3167309a9d1218250a2538bb842fec848a28472cef5390b71b
pdf-font-stream PDF embedded font (sfnt) at offset 0x676A 16248 bytes
font_02_sfnt_off00009862.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9862 4324 bytes