Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ea412036e4c914…

MALICIOUS

PDF

38.8 KB Created: 2020-08-31 14:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c186716542a2ee26fac44358b3aaf06 SHA-1: e01af363ffd2b56378cc62b013d9298d3e70aa60 SHA-256: d5ea412036e4c9142e1d507eb44c4fc6904d0aba2e34019313ba51e9a8e15d54
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/wix?keyword=connotation+worksheet+free'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The document body, though heavily corrupted, contains fragments that suggest a lure related to 'connotation worksheet free'.

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/wix?keyword=connotation+worksheet+free
    • https://static.usrfiles.com/ugd/79e0dc_13f9f159686f44fcb9ff327f1556c9bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_857fd19f984e4c0fa702c7e3211b0246.pdf
    • https://static.usrfiles.com/ugd/3e5d97_1de1727886954ede835311e2d8cfd3ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_18a7b2f238d04a11a77e10866007eeee.pdf
    • https://static.usrfiles.com/ugd/2ac701_c845c8c42df74355ba18bfaeb5debfe6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ccba908413f4b75b4dbe3ec35274bd2.pdf
    • https://static.usrfiles.com/ugd/3f80ec_5e3853fb165a472e9366b6e2ee8fe7b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_864fbe2948584068aa4051a1a94a0eca.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/resulezozujogibibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/miwadexipab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/xoronezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1541/files/john_deere_112.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_off00005ab6.bin
1b7a586ed8d995ad55f394bcb31fe231bd441d1e5339998e4774d2a96ab58e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 4884 bytes
font_01_sfnt_off00006b5f.bin
e32016d2b7c5cf2982eecb815375797aa7b5e1f21a3d3c3029912fddf11304fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 10348 bytes

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