Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5a7fbade7ea33a…

MALICIOUS

PDF

45.3 KB Created: 2020-08-30 22:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba882191966cd34220458d1cc8df7b2a SHA-1: 308c61e8eea804f69962d8291f3c788f7c410bca SHA-256: 4c5a7fbade7ea33a398db26d003c419f2e72abeb618297c731068de3aa7600fe
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=blackweb+wireless+mouse+drivers'. This URL is presented within the document body, suggesting a lure to trick the user into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness. The primary intent appears to be directing the user to a malicious site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/wix?keyword=blackweb+wireless+mouse+drivers
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/wimizovosuwakewutireluv.pdf
    • https://cdn.shopify.com/s/files/1/0459/6832/6816/files/madojopajemurexefaverul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9071/files/free_download_foxit_reader_for_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2735/files/78592002624.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/email_format_for_payment_request.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/40844766144.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6731/files/ccna_routing_and_switching_portable_command_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/65895004168.pdf
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/wuvifizanufuwove.pdf
    • https://static.usrfiles.com/ugd/b8c837_44ee9e6a51354724945d84025c0f908b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://static.usrfiles.com/ugd/7603ae_db37f55270b3403bb79d4d78fc5669ba.pdf
    • https://static.usrfiles.com/ugd/63d3ad_ce5837a102d044f3b0dda9bf0dc580eb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/vufegoxivofagebanapiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/imf_2019_gdp_report.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_off000065f0.bin
cfcf618859f626ecf80977a12fcb900e43d3becf7862568e3af0bfbf546f5aad
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 5188 bytes
font_01_sfnt_off00007799.bin
54fcf09e587c922d8cbbcb3659d5f350b6e1c2fccdc86a3eb91617e6e5f0c6b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 10072 bytes
font_02_sfnt_off00009a2e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2E 4324 bytes