Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2cbca9b45f584e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 21:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93a51c9cf8c17319a4db59b841147d2d SHA-1: a9000a5669291015d8388fbd771909319b62fb25 SHA-256: 3b2cbca9b45f584e1d219f21499dffbd92e3e416058ca67faeb4c6d6b02228f9
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.ru/pify?keyword=contrastive+analysis+and+error+analysis+keshavarz+pdf, which is known to lead to malicious infrastructure. The document body itself is heavily obfuscated but contains references to the redirector and other PDF files hosted on various domains, suggesting a link farm designed to distribute malware or phishing content.

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=contrastive+analysis+and+error+analysis+keshavarz+pdf
    • http://files.uniteoffshore.net/uploads/1/3/1/0/131070846/wimikawigaxuwe_bodavigir_vejibejovosewu.pdf
    • http://dewugejot.artwithross.com/uploads/1/3/0/7/130775350/kafizunaduluvedala.pdf
    • http://files.thetruthsayerswoodstock.com/uploads/1/3/1/8/131856277/9944731.pdf
    • http://divojer.nancyives.com/uploads/1/3/0/7/130738970/namapivufenuki.pdf
    • http://files.q72spiceco.com/uploads/1/3/2/6/132695418/ritiwex_faseb_karuxisaxebusat.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/zagomifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/43773409712.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/16099560263.pdf
    • https://cdn.shopify.com/s/files/1/0430/0429/7375/files/33656998118.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/9767529497.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/basagefigal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/investigating_biology_laboratory_manual_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/dorikavawosil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/ds4windows_minecraft_profile.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/8265666865.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/pip_install_pyserial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/vitosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/27055341832.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_off00004e08.bin
7d922a725df01930a04643c593cd149619002adf71a20aa3f45b6de2e41813b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E08 5308 bytes
font_01_sfnt_off00006024.bin
97bed80651d854e67b6e3a0e26d2a6b279568ff0ef47897b0919cb6f67125562
pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 9228 bytes
font_02_sfnt_off00007fe7.bin
c51d8d04dda7ef1bf63c7e07fd1f95d15e6c468513810fe57a9e67705f1546af
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE7 17000 bytes