Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbfd5ee6495ce74…

MALICIOUS

PDF

62.0 KB Created: 2020-08-12 17:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9161b56b5fa12bdd15f5e88d98d7101d SHA-1: bb60c2782bd31f0bf50234949779ddd0953b60c3 SHA-256: dbbfd5ee6495ce747773b7039b3a8db49dae741b9114980586f95309be686d59
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The document body is heavily obfuscated, making it difficult to determine the exact lure, but the presence of the malicious redirector is a strong indicator of malicious intent.

Heuristics 3

  • 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.
  • 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/pify?keyword=horizontal+ball+mill+pdf
    • http://files.gefcsports.org/uploads/1/3/1/3/131379246/deca145.pdf
    • http://files.operationcleanoutia.com/uploads/1/3/1/4/131437370/5865220.pdf
    • http://files.motivationbymaia.com/uploads/1/3/2/6/132695405/31d9e66e71c1.pdf
    • http://vubez.blackmomsstaylifted.com/uploads/1/3/2/7/132741593/fiwatomukofemo.pdf
    • http://ragepedex.phaccounting.co.uk/uploads/1/3/1/3/131380600/fizumul_seburuxa_berajado_fadeguvibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/79901966396.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/9845419627.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/26506849752.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/72745477431.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2761/files/sizobime.pdf
    • https://cdn.shopify.com/s/files/1/0445/2777/9999/files/35._333333_40._15.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/arabiyyah_bayna_yadayk_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/kodusaneruxufux.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/80686192226.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/ejemplos_de_analogias_verbales.pdf
    • https://cdn.shopify.com/s/files/1/0435/3281/2439/files/pelusegetoretefesuri.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b61f.bin
c17f3ceb12984ff9f7cb9ce4084ab6b1b127acf0ea555becefa6ac5161317570		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB61F 5160 bytes
font_01_sfnt_off0000c791.bin
7fb490f15bf881e3fc66aeb6b79fd87aad493ed75089fe6929f7a53e8d60fa14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 10344 bytes

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