Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c22939c2b5af24f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 20:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0605ce17caf416b905a42fb25d14b123 SHA-1: 476927d9300611989b3c412e404143b752e30734 SHA-256: 2c22939c2b5af24f28041dde297360ca781c6c03e39dc9d04c4eb88b5c340022
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=you+re+the+reason+piano+sheet+music+pdf, is identified as a malicious redirector. The document body, though heavily corrupted, contains text fragments suggesting it is disguised as piano sheet music, likely 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 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=you+re+the+reason+piano+sheet+music+pdf
    • http://files.america1funding.com/uploads/1/3/1/3/131398547/juboxom-mijesesudova-lubiguregi-zifege.pdf
    • http://files.hiddenhorseshoeacres.com/uploads/1/3/1/4/131408502/9124740.pdf
    • http://files.nicholassearle.com/uploads/1/3/1/4/131437612/toditidufox.pdf
    • http://files.rodolfoangeloni.net/uploads/1/3/0/7/130776877/napasejizedokopivupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/96174289176.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/faxoja.pdf
    • https://cdn.shopify.com/s/files/1/0437/6782/4533/files/xefinidawevub.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/kukubigavapunon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/xopafarividojepu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/xorosepetesok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/chaupai_sahib_viakhya.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/sunazedovurogago.pdf
    • https://cdn.shopify.com/s/files/1/0429/2159/0951/files/gugodetisatuluveseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2952/files/19989223994.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c4.bin
4b0d4f4a7f79d905668621031b8e8c051bdeffe960433b7c19df9cbb0f5277c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x50C4 5208 bytes
font_01_sfnt_off0000624d.bin
09a9ff21949e5c22449ebb6fca9975ab6486d24c47ae03d8e72a57903261859a
pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 15220 bytes
font_02_sfnt_off0000922c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x922C 4324 bytes