Malicious PDF — malware analysis report

Static analysis result for SHA-256 b686177230601d46…

MALICIOUS

PDF

34.8 KB Created: 2020-08-20 13:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba88053fe5f7278ed8345dfaf1c3a9b SHA-1: 402939a0c93eb9fa6e3a2de11ac2d1dd7842cfb7 SHA-256: b686177230601d463e4fb6d108759f5fa61b6fbe9ae73c4f417c19ce6ea6a811
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=seed+dispersal+worksheet+grade+2', is flagged as a malicious redirector. While the document body mentions 'seed dispersal worksheet grade 2', the overall structure and the presence of numerous external links, including one to a known malicious redirector, strongly suggest a malicious intent to lure users to harmful sites.

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=seed+dispersal+worksheet+grade+2
    • http://files.kamiza.com/uploads/1/3/2/7/132740277/xawab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/purple_mattress_purple_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/8036/6745/files/83700081576.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/dulasepanisiwetekinukibol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/sifidetarusizataxewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/anand_vihar_isbt_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/itoa_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1846/files/calypso_song_muzmo._ru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mizamolapo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/giguwusifaxajapobubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4885/files/nejikazenibitizanexasik.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/pcr_genomic_dna_template_concentration.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/patofisiologi_atresia_ani.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_off00004889.bin
e68237a1871aaf9152068d6497199d2e0d5c0a8b2d7f4b6f009a830b05574e3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4889 5612 bytes
font_01_sfnt_off00005ba9.bin
d3cce722d7eb0a7307bf5011aeed7af5c74466b72ca65749f9e58d0287731923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA9 10212 bytes

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