Malicious PDF — malware analysis report

Static analysis result for SHA-256 599f73708f92fde7…

MALICIOUS

PDF

36.6 KB Created: 2020-08-16 21:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 012937b54eb4a80ab55c710201844c9c SHA-1: 58af9f0fc77f093fc3b212d61fd09ded8b293d2b SHA-256: 599f73708f92fde7759205fda9a5bfdb330bccf20b15c369e05c89a7c42f0bd8
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL is 'https://ttraff.ru/pify?keyword=bondhurey+by+siam+video+song', which is likely used to redirect users to a malicious site. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malware.

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=bondhurey+by+siam+video+song
    • http://sixuk.newdundeefireworks.com/uploads/1/3/2/7/132740515/kikukases-tinepozogarafaw-refasidizej-zetako.pdf
    • http://difom.francesharriet.com/uploads/1/3/1/3/131398406/9258108.pdf
    • http://files.millennialbarbers.com/uploads/1/3/1/3/131380063/dodosomiju_luzijodim_jesezexafak_mofikoka.pdf
    • http://files.bwmusic.net/uploads/1/3/1/4/131452823/6d7bd918.pdf
    • http://zumose.classicadventures.co.uk/uploads/1/3/2/6/132695384/073938c38.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/diteb.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/zebuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/40582790956.pdf
    • https://cdn.shopify.com/s/files/1/0449/7352/3112/files/application_letter_for_bonafide_certificate_from_college.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/15760275726.pdf
    • https://cdn.shopify.com/s/files/1/0449/6615/0303/files/carpal_tunnel_syndrome_physical_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/80856763061.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/kuvarifuxivisupif.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_off000043ca.bin
5c08da294ea31eb2322f4c7bc52472c1f1ec09ddb888a67b95ae8e7130cc7b17
pdf-font-stream PDF embedded font (sfnt) at offset 0x43CA 5360 bytes
font_01_sfnt_off000055cd.bin
a682be14711902d75bc1d7c1af9f79b8eb980e4495806ec1a30b4f6e3c378d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x55CD 9872 bytes
font_02_sfnt_off0000777b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 4324 bytes