Malicious PDF — malware analysis report

Static analysis result for SHA-256 c240c09923436181…

MALICIOUS

PDF

51.8 KB Created: 2020-08-19 10:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 552cc34ebebca7c9e8fe2388b957b9e2 SHA-1: 134b2baeddb0412879589c72be6f4459310baef5 SHA-256: c240c09923436181f28b8efb5741ef15720996e5d3ea69f5641cfb4e26a6e051
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=popcorn+piano+sheet+music+easy. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'popcorn piano sheet music'. No scripts were extracted, and the PDF structure itself is the delivery mechanism.

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=popcorn+piano+sheet+music+easy
    • http://files.westcentralcamp.com/uploads/1/3/2/8/132815342/7229466.pdf
    • http://files.bulacanliving.com/uploads/1/3/0/7/130775137/sazoze_fukipebajif.pdf
    • http://kuzusig.nickamatangelo.com/uploads/1/3/2/6/132682883/1323590.pdf
    • http://dutokoge.houstonartsociety.com/uploads/1/3/0/7/130776167/vupirufikadodenedok.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/becoming_the_archetype.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/buderus_gb172_t50.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/insurgent_full_movie_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/92028297469.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/kaxigagokusinijomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/sonapuximis.pdf
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/govizukitabinaw.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_off00007a58.bin
1c45ae965081101187260ee0301d40b4e3d12d29f5343a822c4eee2c9ac0513e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A58 4540 bytes
font_01_sfnt_off00008a13.bin
8e55602ea71ac2647d76d8e39e2d756ee3c88fb05ad0820067113d1be22f775b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 5244 bytes
font_02_sfnt_off00009bb6.bin
24cf79a2d0fd4eedb96a66dfea82e94739faae7f81b7e0ac74717ad1741cbda0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB6 11512 bytes

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