Malicious PDF — malware analysis report

Static analysis result for SHA-256 5272d1bd36f2fd8b…

MALICIOUS

PDF

36.3 KB Created: 2020-08-19 04:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e710c8acff46999d4f689f07fb621f5 SHA-1: 1bde39d7062bcee40afd7d92132480d0ec66d70f SHA-256: 5272d1bd36f2fd8b844c09da393dd3a9b241c9f00f3d47f39ea968509e1629da
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body text, though garbled, contains the string 'Hahaha challenge song' and the malicious redirector URL, suggesting a lure to engage the user. The embedded links likely lead to a second-stage download or a phishing page.

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.cc/pify?keyword=hahaha+challenge+song
    • http://files.boutiquefeisty.com/uploads/1/3/2/6/132683070/xowalujaj_lexibisopefaben.pdf
    • http://files.photobykela.com/uploads/1/3/1/4/131437636/xanolinuruj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/kubefemelupiduzow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3486/files/48745697157.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/9987810130.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/43364197287.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/bhutanese_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/29201985104.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/pudonujavozawigevexagofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/bejuzesodidugumexugil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/85923401717.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/74698515643.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_off00004e92.bin
c6f6ffcfd4a437344ad6b18887d3872e9c924f108c812be5ec641af7faace6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E92 4928 bytes
font_01_sfnt_off00005f4f.bin
4efd5b4f74ebc4559ddfe40f74903c12852595c4f664139914400098f02e1262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 10736 bytes

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