Malicious PDF — malware analysis report

Static analysis result for SHA-256 2090f5b7b5664b18…

MALICIOUS

PDF

34.9 KB Created: 2020-08-13 22:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a39129beb8559c42df86847bbdb3c90 SHA-1: 6e211780b2937e011684055682dc562b04293c7e SHA-256: 2090f5b7b5664b18dba24415b8fd8b82484e8fdd558e622bb3279cbb5c9fb26a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'income tax rules' and a URL that matches the redirector. The presence of numerous embedded links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination. The primary malicious IOC is the redirector URL.

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/wb?keyword=income%20tax%20rules%202002%20amended%20upto%202018%20pdf
    • http://files.happytailspets.co.uk/uploads/1/3/0/8/130814631/jasepuji.pdf
    • http://nemawew.hocobicyclerentals.com/uploads/1/3/0/7/130776330/9622b06.pdf
    • http://files.gaychambercincinnati.com/uploads/1/3/1/3/131384293/zerubiriranikegu.pdf
    • http://files.closdecandele.com/uploads/1/3/1/8/131856624/29b12.pdf
    • http://nuzoma.emboldenfestival.com/uploads/1/3/2/3/132303382/dalakawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/jubixipogoperufizabenufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/tropism_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/sijaduxagoxib.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/minesujusenaxabikegak.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/kajogizozajeruso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/32763293602.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/tulukonugonebikatug.pdf
    • https://cdn.shopify.com/s/files/1/0439/2232/5672/files/introduction_to_wavelet_transform.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/zebivogojeluvozemopibob.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/7499505544.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/wafaligaton.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_off000049ac.bin
7860241a814e30c6f9960d02d8d6152c07579e0241d2b9de49b0220e5643adec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49AC 5828 bytes
font_01_sfnt_off00005d64.bin
e42bba6c9dcdf7bb10fad7bf898900f7d6bb04a795fd39faa214d455652053a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D64 9844 bytes

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