Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ddd2255138e152…

MALICIOUS

PDF

39.6 KB Created: 2020-07-24 20:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41044845ef94f011c1e50b518f66e554 SHA-1: 53cecab98970a32a8ab70f841e1c572bb09c8854 SHA-256: 83ddd2255138e152fa801053a29a09c4f02adb29b73cf7b275a9e3cfe82cb991
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, identified as a PDF link farm, with many pointing to Shopify domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure at 'ttraff.ru'. The document body is heavily obfuscated, but the presence of numerous links and the critical heuristic strongly suggest a phishing or redirection attack. 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.ru/pify?keyword=axilla+plural+form
    • http://files.mindfulnesstrainingsrc.com/uploads/1/3/1/4/131407012/zuterunijawive.pdf
    • http://files.nickskitchendalycity.com/uploads/1/3/0/8/130874668/zaxukebebow.pdf
    • http://files.ivfround.com/uploads/1/3/1/4/131438289/xulesolito.pdf
    • http://files.ivfround.com/uploads/1/3/1/4/131438289/xu
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/rolisiliketa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/36297184735.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/nadabewewinoritopiwola.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/jukinedopulowenajupat.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/95160555932.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/14036667614.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/soworavate.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/86034277271.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/56945987444.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/zewexatitoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/guwisufanujuxuxudixiwuru.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/zafajilatifelu.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_off00005fc1.bin
7afb07f442eea8251ffe27ba82abbde905547a65aac423ea15d97e5a9c945b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 4504 bytes
font_01_sfnt_off00006f04.bin
b6ffe080b2aef3a4c9b43b092c932d45739053545036a017b7bdf82a17074962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F04 10196 bytes

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