Malicious PDF — malware analysis report

Static analysis result for SHA-256 220c25f7024aa27e…

MALICIOUS

PDF

49.8 KB Created: 2020-08-25 14:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8728ff0caf7aaaabf7c3547738dad82a SHA-1: d1d8cba78e2ee7254d85c3545c55d6075e8a588b SHA-256: 220c25f7024aa27ee61d235e248bc09524c1a523d6465eab9325c558a4b0af2f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=improve+your+english+vocabulary+book+2+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, one of which is 'http://files.greendentalpractice.co.uk/uploads/1/3/2/3/132302928/a49a9b.pdf'. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to trick users into clicking through to potentially harmful content.

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.cc/pify?keyword=improve+your+english+vocabulary+book+2+pdf
    • http://files.greendentalpractice.co.uk/uploads/1/3/2/3/132302928/a49a9b.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/barska_stolica_forma_ideale.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/annotate_using_apple_pencil.pdf
    • https://cdn.shopify.com/s/files/1/0435/9667/7279/files/sodium_alginate_beads.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/33895429097.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/championship_riven_2016.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/19985518580.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/nuwisulipugefofefixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/dnd_giant_badger.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/honey_mustard_chicken_thigh_sheet_pan_dinner.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/grade_6_math_worksheets_ontario.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/rirekefufekinugubonaf.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_off000075f8.bin
b651bc0dacc417da1bc8328600c2025213b0df3fb3319d4e315cb1f95f8b3bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 5808 bytes
font_01_sfnt_off00008985.bin
5ff15852f8a782252b600eebb577f82eb51d6be7cc1e0effd4a12575972ecb30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 10120 bytes
font_02_sfnt_off0000ac23.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC23 4324 bytes

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