Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c95f5dc39729d6b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 16:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb9e16282859d9a22135cb624522a87f SHA-1: 24d1e768b76cbee4d29a58af1e9779f198d76dd0 SHA-256: 8c95f5dc39729d6b12f09e9a0b329a559435f52ac38c679210934ce33af270e8
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDFs hosted on Shopify. This indicates a link farm or redirection strategy to distribute malicious content. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=urinary+catheterization+procedure+male+pdf
    • http://files.peaceplanetjournal.com/uploads/1/3/0/7/130740090/momifoz.pdf
    • http://files.trainingoutlaws.com/uploads/1/3/1/3/131398333/bcde270f3c.pdf
    • http://getoderod.canoefun.ca/uploads/1/3/0/9/130969057/7974160.pdf
    • http://files.feedthewobbegong.com/uploads/1/3/0/7/130740062/xelikagevowud-sazewurixavigi-mojufovo-leduledaza.pdf
    • http://files.theaterinthewoodsvt.org/uploads/1/3/1/3/131381555/sedodamubipoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/maya_extrude_along_curve.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6403/files/antigone_ruby_blondell.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/pemewamarepevapubavonipul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/rijapawinokur.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/muwesugenorenavolenukib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/71072364213.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/jajifakovisamuzitig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/10182034332.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/fumonubesivojejon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/befuzaxasowasodetigis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/wukovaturojasufajuniseved.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/fikixubuxizagekat.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/rizat.pdf
    • https://cdn.shopify.com/s/files/1/0435/2347/3568/files/53214454324.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_off00006f35.bin
bcd7e1ea0cc25db49f03ad26b6e390feeb2879176fc8d15e5ff0990854a13cd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 5360 bytes
font_01_sfnt_off0000815a.bin
a39ac39599f261a65e83cf6e43379b7251ead38b18077aea9053f6d90f7ae425
pdf-font-stream PDF embedded font (sfnt) at offset 0x815A 11324 bytes