Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be385f7a3fcde9…

MALICIOUS

PDF

37.7 KB Created: 2020-08-29 18:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ba192630ee92e9a57eb2faabf9ea48 SHA-1: ea3078a58b326f3d981fec575036ffe75db76c94 SHA-256: f7be385f7a3fcde953f7dee8294ecf3aadefb086191f3b7c3d2e8013921e34e8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=c%25C6%25B0%25C6%25A1ng+thi+ph%25C3%25BAc+tinh+ph%25E1%25BA%25A7n+2'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which lead to benign content on Shopify and static.usrfiles.com. The primary malicious intent appears to be directing users to the ttraff.cc domain, likely for further exploitation or phishing.

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=c%25C6%25B0%25C6%25A1ng+thi+ph%25C3%25BAc+tinh+ph%25E1%25BA%25A7n+2
    • https://cdn.shopify.com/s/files/1/0432/8243/2160/files/basic_networking_mcq_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0451/6390/5178/files/physics_student_textbook_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/81184725836.pdf
    • https://static.usrfiles.com/ugd/b8c837_aed81ba7b08a47d29e8023889db43d12.pdf
    • https://static.usrfiles.com/ugd/b8c837_01bd7025355e4564b718e80627547cb6.pdf
    • https://static.usrfiles.com/ugd/576447_b6628bafcde74855817b63d8dd922e8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae1a318ed707480780e7c1d766f775bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8992c6c61f6a4a778ae1079b6b64cb02.pdf
    • https://static.usrfiles.com/ugd/b8c837_0155eac2e7b84841b4212094a8becbca.pdf
    • https://static.usrfiles.com/ugd/b8c837_82215c7f92a84d68842c521fdb60dc0b.pdf
    • https://static.usrfiles.com/ugd/f4de5e_61bf037c6ebb456e9c82ca705fcb456a.pdf
    • https://static.usrfiles.com/ugd/5ed537_1b7f795e5cc4448a99cab9b99dccd432.pdf
    • https://static.usrfiles.com/ugd/5ecadc_42c8144e5c2d4109a60521778083fe2b.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_off0000416e.bin
3959d9ed79a2c104a45ff82d8c55947231acdc589a435433cf9cf0d9908b0e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x416E 5044 bytes
font_01_sfnt_off00005281.bin
c1b28bec891cbc7932a9daa41c31b708be20ebc3408cf66fa27988fbed010d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5281 17664 bytes
font_02_sfnt_off00007a0d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 4324 bytes

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