Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2765079768bdcd…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 22:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e07a94d7a04bc23c13706bd82724dab SHA-1: 98cfd3916273107cc53aad058558bb9611aab02c SHA-256: 8b2765079768bdcdc5e7f81cac361b97e8c574c016b029fadbe88801a1ea70bc
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used to obscure malicious destinations or to create link farms for SEO poisoning. One of the primary links directs to a known malicious redirector, ttraff.ru, which is highly suspicious. The document body, though heavily obfuscated, contains the target URL and references to other PDF files, reinforcing the link farm behavior. No scripts were extracted, limiting the analysis to the PDF structure and embedded links.

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=guide+wire+medtronic
    • http://jeturoluf.allthingssweetandcandy.co.uk/uploads/1/3/1/3/131383309/b91c39e913c.pdf
    • http://files.accelerateddentalacademy.com/uploads/1/3/1/4/131437380/gejaxikidow.pdf
    • http://vojejedos.leevalley.org/uploads/1/3/1/1/131164392/3773220.pdf
    • http://files.for-medit.com/uploads/1/3/1/1/131163833/6535188.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/luresazamodapexoruwer.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/gilufove.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/subtree_with_maximum_average.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/tinkers_construct_modifiers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/61107365008.pdf
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/biological_clock_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51439980706.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5653/files/wutuwimesisotogibawaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/33086611511.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_off000057f8.bin
471984dc4aea0429dedf623ce9adb2979bc03e54204e14818e13b18420d9538c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F8 4788 bytes
font_01_sfnt_off00006836.bin
80051b719c2af712f8992b94d003427d63d044cc68a389e17f419c5b7543cc61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 12492 bytes

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