Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57a92a863470e33…

MALICIOUS

PDF

39.5 KB Created: 2020-08-23 00:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcadbcfebcbaabb78f92f35e257947b8 SHA-1: f65906cfec72f779ceae2dac8f83089d9fd56ab8 SHA-256: c57a92a863470e330a97318a4b20226847f2808601d11630476503280368b208
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution: Malicious Link T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=vlc+media+player++for+linux+fedora'. Additionally, heuristics indicate social engineering tactics, specifically a 'ClickFix' lure, instructing the user to press Win+R or paste a command into a terminal, which is a common method to bypass macro restrictions and trick users into executing malicious commands. The document body also contains the same malicious URL.

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.
  • 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
  • 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.ru/pify?keyword=vlc+media+player++for+linux+fedora
    • http://files.facathletics.com/uploads/1/3/1/3/131380345/7977521.pdf
    • http://files.lotusranch-homes.com/uploads/1/3/1/4/131407263/5117865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/telugu_calendar_2020_andhra_pradesh.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/dotavaronakid.pdf
    • https://cdn.shopify.com/s/files/1/0429/3319/0823/files/21838186313.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/abstract_noun_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/29418175760.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/pufexiguja.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_off00005bc4.bin
1d8aa45415391664375ff91e9344840e86bbacc01a35b1335e2f727f7c114951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC4 5260 bytes
font_01_sfnt_off00006d97.bin
4b9b92047afd1de68764e9483d22df79496f3bf5c76926f1d7feb4f7285d4fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 10572 bytes

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