Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fe3da59ed11753…

MALICIOUS

PDF

38.6 KB Created: 2020-08-01 08:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79db9921c60309d81892636096ef8222 SHA-1: 29316f76a8f1f9e8b0cc8cf611aa319b95eac4bf SHA-256: a4fe3da59ed11753396230f4f2cc2b222679461dc9bf9b82c13dbca1f92c0aa8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are disguised as PDF files hosted on Shopify. These links ultimately redirect to a known malicious domain, ttraff.cc. This indicates a link farm or redirection attack designed to lead users to malicious content. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous malicious redirector links is a strong indicator of malicious intent.

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.cc/pify?keyword=baofeng+uv-+82+programming
    • http://files.veropest.com/uploads/1/3/2/6/132682882/1429774.pdf
    • http://files.canecreekcloggers.com/uploads/1/3/1/3/131384127/pupejekupipo.pdf
    • http://files.qcopennetwork.org/uploads/1/3/1/1/131163960/fatidituti.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/vadupeke.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/nejabofewobezineg.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/mamorumanadebid.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/sajafigiraluj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/56691187355.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/tomefudivijupazog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/10605097000.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/gajiparuvud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/64119501754.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/pazusevunekeso.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_off00004d40.bin
89fd3bf043da0de55bbba2e99ce130c65060b02586b99ea4d34a6a46c15757e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D40 5480 bytes
font_01_sfnt_off00005feb.bin
f20cb03fbf86b09759d6764519e73ed9fbe51668bbff7ac67a92e2ede29238e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEB 14688 bytes

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