Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a17fea9a7d318b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-12 15:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ad5f3e2222325199628d2f2e2cb7927 SHA-1: e78624f7d3b6da46beee05d06224b21e99a3ec47 SHA-256: 25a17fea9a7d318b0e1655e185cd556b1cdb76e4018e321f8baae8a9866f2eab
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector link, pointing to `https://ttraff.com/wb?keyword=bradycardia%20guidelines%20pdf`. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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/wb?keyword=bradycardia%20guidelines%20pdf
    • http://kitor.psychodrama-sociometry.com/uploads/1/3/1/6/131606255/kijolav.pdf
    • http://files.ukchristianparty.org/uploads/1/3/1/8/131856883/49a48a50b7.pdf
    • http://files.alexbowlerevangelism.com/uploads/1/3/0/8/130873872/mumowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/38702353163.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/canales_de_comunicacion_electronica.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6326/files/5909116301.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/37010883024.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/58081643864.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/zurozabomuxagukilipim.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/romoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/juzip.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/77963834442.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/bawinozejujel.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/pdf_to_word_converter_free_download_for_android_mobile.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_off00005d6c.bin
511d360ea5e339b549715683ae52dea3fcaa73267e87f604f12d9ed1cfdbf47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6C 5476 bytes
font_01_sfnt_off00007022.bin
977b428f7f8651fa64cb388dc6f0237d6e827cce0684a32f2912cf43d0c5bbe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 10256 bytes

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