Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a67de33ef6f7adf…

MALICIOUS

PDF

43.7 KB Created: 2020-07-31 15:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b951ba8392d6df9852b020928b891a83 SHA-1: 900f06997cda2d41a7a0638092d4f522b4304e38 SHA-256: 9a67de33ef6f7adf3750b32a76f3142beb5199027e3ccf1fbf67d7aa471ce6c6
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 'ttraff.com', which is designed to lure users with a 'discord no sound' pretext. Additionally, a PDF link farm heuristic indicates the document is part of a larger SEO poisoning effort. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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.com/pify?keyword=discord+no+sound+from+others
    • http://files.watchrepaircentral.com/uploads/1/3/0/8/130814553/zekifosapuzexow.pdf
    • http://files.plcministries.com/uploads/1/3/1/4/131454521/6644791.pdf
    • http://files.lldmshakopee.org/uploads/1/3/1/0/131071253/pugot.pdf
    • http://files.homeralan.com/uploads/1/3/0/7/130739809/dasafeneguje-tesateve-fuwujifa-zemaviripinipa.pdf
    • http://files.samanthacallender.com/uploads/1/3/2/3/132303175/buxifulal-xagobozava.pdf
    • http://files.samanthacallender.com/uploads/1/3/2/3/132303175/buxiful
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/31591459594.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/koruwuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/97847453825.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zabaravoxetifup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/napix.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/dugovuwefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/gabitolumebagozufowivude.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/42136033067.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/28232037067.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/binifapobonefovife.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/tilebowereva.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_off00006f7f.bin
8facc7065aa352c4fb3660de8210790d94f742aa812ac99a00b51041ada19d45
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7F 4900 bytes
font_01_sfnt_off00007fef.bin
c15f8243365321c6fbc909236916cb3ed47cd6c130f3077aa6b828e3b4b0cf28
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 9932 bytes