Malicious PDF — malware analysis report

Static analysis result for SHA-256 4722026b5494c9ea…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 05:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bcc65317c1637ff748f9fc7b764d64f SHA-1: 204c13d4ef245c6eaab5cb71e02a650e25bf0b94 SHA-256: 4722026b5494c9eabce6fab17e1213dc8468ab9f3225503f7a4b940820876c81
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=the+scarlet+letter+study+guide+chapt'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to external PDF files, many hosted on 'static.usrfiles.com'. The primary malicious URL is likely used to lure victims into downloading further malicious content or phishing for credentials.

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=the+scarlet+letter+study+guide+chapt
    • https://static.usrfiles.com/ugd/d55797_279d055d89ef4812b9f21e0c87dcc9c7.pdf
    • https://static.usrfiles.com/ugd/b80405_3c7074c506d945e887602f9fc657be08.pdf
    • https://static.usrfiles.com/ugd/c33cdb_c080ce6d6b3642a29e79da7ffd4e9ae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_db8c6c37836142628832b224ca873684.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_ca667128e6394314a609d48c9d7b374b.pdf
    • https://static.usrfiles.com/ugd/3fc21f_9a067cd11ace4bbd9768f86bef6e8c18.pdf
    • https://static.usrfiles.com/ugd/7baf93_e67b0123e0b04820b56e6f5039c373bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cda6eb667ad437ca740bd61b864e9b8.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_323fc81b4e854cd5a333f363c07af502.pdf
    • https://static.usrfiles.com/ugd/921909_0a06b3d962ca464489ba8d2e43edbf3d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/75864893831.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/36401584563.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/mudimorelegogedunaxuxak.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/final_fantasy_guide.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_off000062fd.bin
d106333e39835962239d768e67a254fb9f7456aa304ad602b0df73da1192c3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 5052 bytes
font_01_sfnt_off00007445.bin
d08e8532547f05d806a5af374f9e7af50f7552520a146b7b3290570e6f2bc2b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7445 9884 bytes
font_02_sfnt_off00009627.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9627 4324 bytes

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