Malicious PDF — malware analysis report

Static analysis result for SHA-256 35542be337b0886a…

MALICIOUS

PDF

37.3 KB Created: 2020-08-11 06:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 496df2530c632d88e223793ff5b1b5a9 SHA-1: c5480e81547096eb0ddcc7f4bfc0219add53b88a SHA-256: 35542be337b0886a37931bdd67f3ec62c4430af1916ac8d87536f7540eb43c80
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as a catalogue, to lure users to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bathroom+interior+design+catalogue+pdf. The document body is heavily obfuscated, but the presence of multiple Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic. No scripts were extracted from this sample.

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=bathroom+interior+design+catalogue+pdf
    • http://files.soundplanning.net/uploads/1/3/0/7/130775506/1396580.pdf
    • http://files.dianebattistello.com/uploads/1/3/0/7/130775475/2063923.pdf
    • http://gojati.poverty-conference.org/uploads/1/3/1/4/131483371/2029557.pdf
    • http://domawefok.romforsenate.org/uploads/1/3/2/3/132303382/warit.pdf
    • http://jutodokaw.ashlynnsboutique.com/uploads/1/3/1/3/131398140/9728499.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/90094309280.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/82206444716.pdf
    • https://cdn.shopify.com/s/files/1/0446/9538/8313/files/array_functions_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/40596972757.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/kikojiletinaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/46909850362.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/hindu_boy_names_starting_with_k.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/administracion_por_calidad_total.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/zaxatojigojekoxusutovezef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/94999282565.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/tasonumika.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/87471911870.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/lejuwile.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_off0000542b.bin
ee5b90e8c2d2b931d1f045e9110c128991322f218d9098b351d62c2301dbced5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542B 5616 bytes
font_01_sfnt_off00006723.bin
27bd8c536bd70515b3afed70897abee0e04019b0d5d5145fd942676f654713bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6723 9716 bytes

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