Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2ef25f68d3b4fa…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 09:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9409029face8ab220da6c0d95260ecb4 SHA-1: 894e64bf1e6819eb54d0efedbfb21cdec1bd634c SHA-256: 3e2ef25f68d3b4faf958cbaec0f348d674d23a9e163a5095f60281ae2ce78bba
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains references to educational materials and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links to external PDFs, including benign ones on Shopify, indicates a link farm strategy to potentially improve search engine ranking for malicious 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.ru/pify?keyword=anatomy+of+flowering+plants+class+11+ncert+solutions+pdf
    • http://files.yellowstonebendcitizenscouncil.org/uploads/1/3/1/8/131856186/pafikukos_xufoperuduku_sefuzemijexeguf_bapatujosu.pdf
    • http://sobalupi.consolidatedpropertyservices.org/uploads/1/3/1/0/131070786/gatapikovukokebuwug.pdf
    • http://files.laslenguitasclasses.com/uploads/1/3/2/6/132696598/besususik.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/malaria_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/rurevusalosojitamimutal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/juxego.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/89303191025.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/43643103552.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/zakukikagejumifodemofevut.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/evolution_of_sporophyte_in_bryophytes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/pofawujupuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/bevaligokatupolomezebamel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/xebopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/27078091187.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_off000060b8.bin
9c86989c34d46b95bb8664cace360b89c67a1069423b9d3f3895900daac7e827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 5708 bytes
font_01_sfnt_off00007434.bin
80a9aac6955b21cbe0a46f3fcacb7802c5c623e37af472861c182204a61ba7ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7434 10280 bytes

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