Malicious PDF — malware analysis report

Static analysis result for SHA-256 347785e1548d398e…

MALICIOUS

PDF

68.9 KB Created: 2020-08-12 12:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fe163418318233389abe0652f06b037 SHA-1: d15a08c6de767887fadcf4fcba9693d504308fba SHA-256: 347785e1548d398e39af51d74ed01ed30dd6dab04f09f9ef27acb03799cc9e8a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download for 'Active directory server 2020 r2 pdf'. It also includes a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The document body itself is heavily obfuscated but contains the primary malicious URL. The heuristics indicate a lure to execute commands via the clipboard and a password-protected archive, suggesting a multi-stage attack.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=active+directory+server+2020+r2+pdf
    • http://roretizet.ceramics.se/uploads/1/3/2/6/132695569/3e692fc.pdf
    • http://giwamuj.dreamhomestagingllc.com/uploads/1/3/0/7/130775934/kokisakosa.pdf
    • http://gasuzulog.theredpillrenegade.com/uploads/1/3/2/8/132814930/9849292.pdf
    • http://files.danberkey.net/uploads/1/3/1/4/131483386/6492457.pdf
    • http://files.tara-sarahna.com/uploads/1/3/1/8/131857114/11bb05e81d.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/jokifiparelekebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/riranijatinolirapiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/mesenedekegavoveto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9049/4119/files/21416934523.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/dijugikaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/puxofakafusomu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/berlin_tourist_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/mikimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/how_to_fix_echo_on_discord.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_off0000c23d.bin
3f528e299deae2e87573ffbae7cc5ba465b543880d5ed9b3af79c599b0e16d79
pdf-font-stream PDF embedded font (sfnt) at offset 0xC23D 3072 bytes
font_01_sfnt_off0000cd37.bin
7b7319768fd8d533e410c5135a2009f5c1e0e60f484f2b9bbd6fe0e647fe0b9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 5332 bytes
font_02_sfnt_off0000df81.bin
a7bafac37543a7d44e08a70bbd6aa0c9c02c366b05403bd20ad3db3fb00a45b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF81 11780 bytes