Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca74710d7ce8f067…

MALICIOUS

PDF

48.1 KB Created: 2020-07-27 14:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c9b89700a43d603e90e7d101805310 SHA-1: 83ba8d23e060e61ece221951a965323f24b47eb4 SHA-256: ca74710d7ce8f0676b5dc1903929fefa7a9a8fc4adef62b8db43cefed097f8e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to 'common linux commands cheat sheet'. The PDF also contains a large number of embedded links, many hosted on Shopify, which is indicative of a link farm. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document attempts to trick the user into executing commands via the clipboard.

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.
  • 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
  • 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=common+linux+commands+cheat+sheet
    • http://files.oberonmassage.com/uploads/1/3/1/4/131453252/7e825c12dc.pdf
    • http://files.photosbywildwood.com/uploads/1/3/0/9/130969185/ruminuwemuzexalusak.pdf
    • http://files.michellemmonagin.com/uploads/1/3/1/4/131453294/putawux.pdf
    • http://files.duntonstreetcommunications.com/uploads/1/3/0/7/130740200/susufuxajox_wisawozexu_putux_zinukuli.pdf
    • http://files.theguardianofnature.org/uploads/1/3/1/4/131453429/najozedunipa.pdf
    • https://cheatography.com
    • http://files.michellemmonagin.com/uploads/1/3/1/4/131453294/puta
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/92954763702.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/87082444259.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/85110751120.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/wigawarirosuramojabiwenux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/21193440615.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9212/files/47877362876.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/nolixijijepezuxojixal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/47710255162.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/91032691577.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/jelapoxaxatowuxumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/sikafuteg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/44625723692.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_off00007dc5.bin
636b217ef7c8c9213eae06d0b5da6b4f75a4f6b9b0415055d0722a795ba248b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC5 5056 bytes
font_01_sfnt_off00008eca.bin
262509e94410e26be088c0150bcc15f2bf2b122317013f50142e07afba7cfb3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECA 10504 bytes