Malicious PDF — malware analysis report

Static analysis result for SHA-256 b902a3994692467f…

MALICIOUS

PDF

57.9 KB Created: 2020-09-01 10:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ea3b5439acc71955111f53a389ee5d SHA-1: 2381a88b5fd2db115122463eee7099d5ea438a1e SHA-256: b902a3994692467f5db701a0494ea2a187c672550ac0461b081dee6e12037087
128 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious payloads. The document body and heuristics suggest a lure related to scholarship information, aiming to trick users into clicking the malicious link. The presence of multiple external PDF links also indicates a link farm, likely for SEO poisoning to increase visibility of the malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=5th+scholarship+answer+sheet+pdf
    • https://static.usrfiles.com/ugd/ca300b_6a95daa8421a42e8a141193cc995fc29.pdf
    • https://static.usrfiles.com/ugd/4117a9_3bf08e5101b24a1893ae023c45e10a7f.pdf
    • https://static.usrfiles.com/ugd/225520_ca4c2f7bbd7d4e91b11ad768f9677474.pdf
    • https://static.usrfiles.com/ugd/277b62_7719fa6757cc4d2fad5b66b177df3175.pdf
    • https://cdn.shopify.com/s/files/1/0437/6926/6333/files/gegekolezik.pdf
    • https://static.usrfiles.com/ugd/83e24f_1bbe00f79d324a6bbc5b538a1b0c61e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_741b7f6a61d14d2093375e09dc85b30b.pdf
    • https://static.usrfiles.com/ugd/b5472a_f2a3e5726faa4c90bfa8b86beda12589.pdf
    • https://static.usrfiles.com/ugd/4d935e_1056680e8bbc450ab860dc8c53d0d8b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3425ea3cae1047a7a6a250a5698b0591.pdf
    • https://static.usrfiles.com/ugd/16a96a_343629da1ecc41e1a095caa46013f71b.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071c0.bin
607f50fd2b16f4aa3a32d0e84969cb3ba0d6de62ca7acdacdd91de5a8c34b2ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C0 5152 bytes
font_01_sfnt_off00008342.bin
a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 3720 bytes
font_02_sfnt_off00008ea2.bin
c029f12b946edde39971108d83c3bc2f7593d30960cf826f71903492c84e6b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA2 10684 bytes
font_03_sfnt_off0000b2b3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B3 4324 bytes
font_04_sfnt_off0000c0b3.bin
ba8a45c138bb858120b03cdc91c699730589e673bb8f8a6fbf679527cd578f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B3 7336 bytes

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