Malicious PDF — malware analysis report

Static analysis result for SHA-256 519d881e9f7ef41a…

MALICIOUS

PDF

41.2 KB Created: 2020-07-09 05:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9392d51350064335eef5a0d98bd8d251 SHA-1: 49d7f3bd0b1c08029778569bf27bb238c60c280d SHA-256: 519d881e9f7ef41a0970c543ee483f66667915a796d8ad4782d7fe0f8cf4ca69
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to improve search engine rankings. One prominent link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a URL that appears to be part of a phishing lure.

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/wb?keyword=lettin%20it%20all%20hang%20out%20an%20autobiography%20pdf
    • http://files.altitude3330.com/uploads/1/3/1/4/131406153/degixa-bipavurabogi-wolejaro-lobaligiva.pdf
    • http://files.phsgolf.net/uploads/1/3/1/4/131408344/xaxuz-deriwu-babelivojati-wovezobulu.pdf
    • http://files.aleksandragwardiak.com/uploads/1/3/1/0/131070861/balinaz.pdf
    • http://files.ranranlu.com/uploads/1/3/2/6/132695332/gavizifigobewu_legovewa_femavejalug.pdf
    • http://files.catalyst-now.com/uploads/1/3/1/0/131070527/sizodu.pdf
    • http://files.ict-conferance.org/uploads/1/3/1/3/131379049/2300739.pdf
    • http://files.dylanness.com/uploads/1/3/0/9/130969819/860cb.pdf
    • http://files.discerngod.com/uploads/1/3/1/8/131856331/wejawitilitak.pdf
    • http://files.risk-and-resilience.co.uk/uploads/1/3/1/6/131606864/862fe.pdf
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdf
    • https://fiwojinugir.files.wordpre
    • https://zamukesokumo.files.wordpress.com/2020/06/60399237318.pdf
    • https://ganotibav.files.wordpress.com/2020/07/dodurotezabaxanaxumuz.pdf
    • https://mewulatej.files.wordpress.com/2020/06/besipifad.pdf
    • https://pekuseni.files.wordpress.com/2020/06/mijukuxiselupawivaketawiw.pdf
    • https://fiwojinugir.files.wordpress.com/2020/06/92341360260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.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_off00006222.bin
db07f49021d1a4bd3a4a25a643399aa4fc02f7df45fa73ed6c8442fac4db3b20
pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 5188 bytes
font_01_sfnt_off000073ba.bin
10cf6d74e0a5094c7638b59ff9b0bc3116165a95d7165a4fb76ee9f405719285
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BA 10472 bytes