Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0efdb390c4fbc7…

MALICIOUS

PDF

37.6 KB Created: 2020-08-20 00:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 436366b2046ec365cadef5096c526da7 SHA-1: ef00493185d54529f8c8a87afd42942128acdd0e SHA-256: 1c0efdb390c4fbc790b631e8a5815a4df06faada0e51060b8e3e9644bd1228bb
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 Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector, suggesting a lure for users seeking free piano sheet music. The primary intent appears to be redirecting users to malicious infrastructure.

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=going+home+piano+sheet+music+free
    • http://files.biorbnz.co.nz/uploads/1/3/0/8/130874394/366ca2e445.pdf
    • http://files.ntridingacademy.com/uploads/1/3/0/7/130739971/zulerebaxijilub.pdf
    • http://files.saltandspa.com/uploads/1/3/0/8/130814666/2240212.pdf
    • http://files.beulahlandbiblecamp.org/uploads/1/3/0/7/130739809/48c4f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/76018196697.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/fijimamisonodovemagunox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/cea_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/21286880276.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/17178364357.pdf
    • https://cdn.shopify.com/s/files/1/0438/9804/4568/files/aspen_hysys_program_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/24527583219.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/bacterial_protein_secretion_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/vuxujibakojusovevudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/named_ranges_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/31802899707.pdf
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/xebakomovoreguvuwikisosir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/nitukitekorifezose.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_off00005404.bin
9fad011acf14c6f74d5f696176302bdf9d80750a219ffda25a52ec87b82982c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5404 5428 bytes
font_01_sfnt_off00006654.bin
c4d0fe4a726dc4b406ca81b8129f5278fa784fee792cf84cc5666fc92c7079dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 10204 bytes

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