Malicious PDF — malware analysis report

Static analysis result for SHA-256 f816a704a395e86c…

MALICIOUS

PDF

69.6 KB Created: 2020-08-24 20:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b316f160596b62a0b1f5cdbd2844f3c SHA-1: 4074bc4c9cc647c8b73a9392b334ae43d20b5cf4 SHA-256: f816a704a395e86c82a227089a5686c5c19abfe4753287e87b429c34330aef6d
220 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. Heuristics indicate the document impersonates a cloud service and instructs the user to copy/paste content into a shell, likely to execute a payload. The presence of a password-protected archive lure suggests an attempt to bypass gateway scanning.

Heuristics 6

  • 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
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=android+sdk+17+version
    • http://files.thesharpeningstone.com/uploads/1/3/1/8/131856771/vusagud-zojebepuk.pdf
    • http://konawip.beachpack40.com/uploads/1/3/1/6/131606343/519850.pdf
    • http://files.njsfcahh.com/uploads/1/3/0/7/130740180/jalasigalilipa_lomad_gafujexe_fafemuj.pdf
    • http://files.northmiresouces.org/uploads/1/3/1/3/131384589/fakirorefamopar.pdf
    • http://files.northmires
    • https://cdn.shopify.com/s/files/1/0436/8960/7321/files/vozaredamujatemibad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/rimatizepukupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/38773792611.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/wofetopiravivotozen.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/oracle_forms_ebs.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/32308132197.pdf
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/64741609047.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/34660157209.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/biology_notes_for_neet_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9807/9399/files/design_and_analysis_of_algorithms_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0458/1693/8662/files/pdf_split_tool.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_off0000bb32.bin
2bb67df2b1ffc34b41165df1688a5c6f78fafd4159f594b961cd46318b7f5f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB32 4532 bytes
font_01_sfnt_off0000caa2.bin
ae0c48b3c7fe552a0d419a06e95c62866e3d5b8dc09f94874db38aa08200a099		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA2 15616 bytes
font_02_sfnt_off0000fafd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 4324 bytes

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