Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b47c32ec40ff47…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 21:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5f4b10a6f1dd311fc157fd834d38e72 SHA-1: 96c4a93ffe7762d36b4fbaf0fb1b0b51ae315c07 SHA-256: 82b47c32ec40ff4759696d9f5b73c7c92b3bdaa06b5f3370c269192a6c5f569b
130 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, disguised as an answer key. The document body also contains this URL and other PDF links, suggesting a social engineering lure to drive traffic to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=ssc%20mts%202019%20answer%20key%20pdf
    • http://files.jodisandfort.org/uploads/1/3/1/6/131607374/dewuzepu-toxufejatox-jafifuwudifo.pdf
    • http://files.pursuitofwellness.com.au/uploads/1/3/1/8/131871556/vozisa.pdf
    • http://zevokem.mikefosterstunts.com/uploads/1/3/1/6/131607163/4594341f68552.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/zenoxebezevuma.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/e46_bentley_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/51087450350.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/dnd_5e_monsters_by_cr.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/lovitalunow.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/building_drawing_notes.pdf
    • https://cdn.shopify.com/s/files/1/0440/7325/5062/files/kenaseje.pdf
    • https://cdn.shopify.com/s/files/1/0438/9172/0347/files/minecraft_village_map.pdf
    • https://cdn.shopify.com/s/files/1/0450/6848/4758/files/ad_art_bkprmi_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/dupupinisixisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/nebepasowanuvat.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_off0000689c.bin
00ba79da946fb206257272756618d00276376beb225891c9280667b298428ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 6112 bytes
font_01_sfnt_off00007d73.bin
67dc136248cce3b01326eac3313d4fbde6fdc5fcbedbb0ced9e6a60f6a7ed834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D73 10496 bytes

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