Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8a72b3c4290610…

MALICIOUS

PDF

40.9 KB Created: 2020-08-12 01:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74322117a354eb45004344debce132cb SHA-1: aa722a5ed99be7ab6bfca17a981c6f0c1d8b888c SHA-256: ba8a72b3c429061073197bd63465341d39fb2eb56442b9e8d539382c2cef2d26
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 point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at ttraff.ru, which is likely intended to lead the user to further malicious content. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting a social engineering lure.

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=surface+area+and+volume+of+solid+figures+pdf
    • http://files.bassettlaw.com/uploads/1/3/0/9/130969656/8564966.pdf
    • http://files.axeskiphire.co.uk/uploads/1/3/0/7/130776779/6f51db260a3.pdf
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/doloxazunuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/nodagovajodot.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/26860832677.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/24719692553.pdf
    • https://cdn.shopify.com/s/files/1/0448/0860/1762/files/73955389917.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/auditoria_informatica_echenique.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/48110732589.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/zimojexugujenorus.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/39255203642.pdf
    • https://cdn.shopify.com/s/files/1/0429/1353/0019/files/37962122275.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2063/files/affirmative_action_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/13086693785.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_off00005fee.bin
050483e402887d9d74af567813392ff99ebfe1253faa6317c4003804f36abcc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 5636 bytes
font_01_sfnt_off00007304.bin
8bd2ba42b7def54a1a82b4637ce0ed4405db6ac9d0a6b90ae3ecc9020c897458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7304 10388 bytes

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