Malicious PDF — malware analysis report

Static analysis result for SHA-256 9081c58739a49881…

MALICIOUS

PDF

70.3 KB Created: 2020-09-02 18:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90678dcdd888065c1d75b776571eba17 SHA-1: e3e0ded354bf9880449dc8c984e5145c3093fa91 SHA-256: 9081c58739a498815132e0de2d0dde861412d50a65ebc0a310130e4f8ca12377
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=formative+assessment+que+es'. Another heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The primary attack pattern involves redirecting the user to a malicious site under the guise of educational content.

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.com/wix?keyword=formative+assessment+que+es
    • https://static.usrfiles.com/ugd/3e0cb9_f982d056c4dd47b48643b43398b11bbe.pdf
    • https://static.usrfiles.com/ugd/b9801a_846793b6e727432d9e54e761b95d2a48.pdf
    • https://static.usrfiles.com/ugd/b8c837_394a5068d7e449e1b1c9c88527e82da4.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/pazuximavupanerokevabuf.pdf
    • https://static.usrfiles.com/ugd/b8c837_21cd1a1bc45d4a549ae9719109255894.pdf
    • https://static.usrfiles.com/ugd/270e53_97f4bcb42b9d41eca35458754afecf0c.pdf
    • https://static.usrfiles.com/ugd/9e53d4_15eda5b284bb4b4b9b8edea6f7725025.pdf
    • https://static.usrfiles.com/ugd/3b7182_bbd9322bc9bf4bbab6cf9ac35e49daa3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/essential_calculus_james_stewart_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/android_google_analytics_vs_firebase.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/nejiwa.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_off0000d6cc.bin
235471d65cee26a6a468841368a934a6a919a1f60975edfbcc67a7add0b3da5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 4940 bytes
font_01_sfnt_off0000e788.bin
6a26727e90c76df21ec70b85365a6e6968291f5b0bdd0fd4f22941d47f72ad40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 11000 bytes

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