Malicious PDF — malware analysis report

Static analysis result for SHA-256 22795b7412bac1a4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 00:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 658ea5028086fd29c27181945e98ef6b SHA-1: f08a1f55042b3db29e559631a71b92eda1a26aed SHA-256: 22795b7412bac1a461236146b8798558ef3abfb4ce4e805cc9c6d1679893857c
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, with one identified as a malicious redirector. The heuristic firings indicate this is likely an SEO link farm designed to redirect users to malicious infrastructure. The document body itself is heavily obfuscated and contains a URL that matches the malicious redirector.

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=past+perfect+modals+exercises
    • https://static.usrfiles.com/ugd/26938b_3a32efbdcd91495d832907ee27f5715a.pdf
    • https://static.usrfiles.com/ugd/b8c837_19e102540730479fa24403e4e216ae7d.pdf
    • https://static.usrfiles.com/ugd/834936_671e0cff2ef047baafb46c2cc452d353.pdf
    • https://static.usrfiles.com/ugd/09c3c7_56947bec9e4d48ba8636707f815a9dfd.pdf
    • https://static.usrfiles.com/ugd/ca32a8_165414bb40d2413baa7dea0801e06f3b.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/noroot_firewall_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/gujaloliwun.pdf
    • https://static.usrfiles.com/ugd/0789d5_0dde53f195a54bbb949314cad7b717e8.pdf
    • https://static.usrfiles.com/ugd/271e65_b8cc730f8c0f4a63a72f5ae552123d51.pdf
    • https://static.usrfiles.com/ugd/b8c837_75560a67bc894a448044a18ddd58077f.pdf
    • https://static.usrfiles.com/ugd/01bc73_5d3473bb13eb4fc2a61f02f3b3c6f449.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_off00005e3d.bin
da67d30f3501ca6e21a8d4cf3d78b9d736b397ece551d4eb2dd6f783775ba0a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3D 5372 bytes
font_01_sfnt_off00007067.bin
ef43d7b24a27ca90951d2f0d92065cd46733e26f9490c4890408612058032e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7067 10196 bytes

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