Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5b17361cdf4c8d…

MALICIOUS

PDF

53.9 KB Created: 2020-08-17 03:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726db36b9c5a66b70dd4707006c590aa SHA-1: b77e6ba67a56777aed0c0b4425e946c859473b7c SHA-256: 9b5b17361cdf4c8df48448dc87ff12dba505d251e7cd6b0b7eca0107cac9cd06
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO manipulation or to hide malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=rational+fasting+by+arnold+ehret+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=rational+fasting+by+arnold+ehret+pdf
    • http://juvowebam.procon-loe.ru/uploads/1/3/2/7/132710621/f825ba.pdf
    • http://files.jenniferpolo.com/uploads/1/3/1/3/131382346/ruruvek_vedojuro.pdf
    • http://files.astrologyoncall.com/uploads/1/3/2/6/132683014/fezudiden-robeze.pdf
    • http://files.ambergirl.org/uploads/1/3/1/1/131164475/1862fbfb4d78b28.pdf
    • http://files.populationservices.org/uploads/1/3/0/9/130970012/fdb59.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/69974947860.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/87151139162.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/que_es_el_branding_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/guxoneduf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/jovapaberusupikomokamira.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/tepikuxuzizov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xefafozerokadugatevaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/96870411221.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/18978056070.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_off000094da.bin
d56ad754f8c497c1d4c194c5e27f1bca3b32d50e5503e587bb190dfc059e30aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 5552 bytes
font_01_sfnt_off0000a7b7.bin
45742b65df98231f0f651d93337e4aad83a4fd410bae4bec8a16e7babc0bf9a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B7 10260 bytes

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