Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadfaa3c4d45732a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 21:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f5a688a25ecec77a11c8136466423ab SHA-1: 25526a898a72c6141f3e90373bc96d5ac4ccc09d SHA-256: aadfaa3c4d45732a2dae36514c7aedfd9e20e88eb70c2ad10a260a5f1ff3df39
200 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.003 Windows Command Shell T1204.001 User Execution: Malicious Link

The PDF file contains a malicious redirector link pointing to 'ttraff.cc', which is associated with malicious activity. Additionally, heuristics indicate social engineering tactics, specifically instructing the user to copy and paste commands into a shell (consistent with ClickFix attacks). This suggests the document's primary purpose is to trick the user into executing a command that would likely download and run a secondary payload. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious intent.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=acrobat+reader+linux+ubuntu+18.04
    • https://static.usrfiles.com/ugd/bd5c68_f86ea5d8d33c4fac91003819c2df979b.pdf
    • https://static.usrfiles.com/ugd/b3bc21_df4eebfaa0034b7281db7b1e5a536fb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f63ba92fd3d3488db5a8c617a3ff6671.pdf
    • https://static.usrfiles.com/ugd/de3d83_7d9bf47cc081424483a8fd8a7fd01234.pdf
    • https://static.usrfiles.com/ugd/01e791_ff43e951619c4dd196031c31716fc520.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b7e6ba1dcd4a3a8e9da07b81913988.pdf
    • https://static.usrfiles.com/ugd/b8c837_956b4bcb422545049caddb2fe0b7163f.pdf
    • https://static.usrfiles.com/ugd/b8c837_90cbdfe5e4e44502bfc36b782c597e03.pdf
    • https://static.usrfiles.com/ugd/6da380_d52598852f4f47d7a85a581cfe8f5f68.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb3e30a7953644719d33b12a18250711.pdf
    • https://static.usrfiles.com/ugd/b8c837_06dea61e9b6045e2b43814f8eef68f97.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e736227da9c45b5bb0b3c9fcb3d05c2.pdf
    • https://static.usrfiles.com/ugd/158fb9_1d5bc906c7f14648a834637fd7ec67f2.pdf
    • https://static.usrfiles.com/ugd/f46427_1454c79c8a0e4a93a957bbcf3b44d1cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_49723570578744938ae893b0c9c2b14f.pdf
    • https://static.usrfiles.com/ugd/0d002d_a81081c814e142978e394f41b14add32.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b528761116b4293acba7c73bf157c71.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_off000068eb.bin
75428d361c87d212eb6788d7123613e40f00d6c0c0437ea3e031cbe21194e63c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EB 5460 bytes
font_01_sfnt_off00007b92.bin
56cee2b94e451bbda3600518daac5ceac5ee23194cd1b68c19fe2877150f7bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B92 10312 bytes

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