Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c7950138a57b4e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 19:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53938df37a6526a09d4c282e2fe1a7f0 SHA-1: 14ff1e5be9846b30e2197061e91e8116be8c5e0c SHA-256: b2c7950138a57b4e784a32d736c4c5f419383f057c7825967457fdd7d2a550a5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. No scripts were extracted, and the document body is largely unreadable binary data, but the heuristic firings strongly indicate a malicious redirection attempt.

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=buteo+magnirostris+pdf
    • http://files.abfabescapes.com/uploads/1/3/1/4/131407164/kinugufozivitupit.pdf
    • http://files.jaspercountycommunityservices.com/uploads/1/3/0/7/130738836/topominuvuwerid.pdf
    • http://files.churchofbeethoven-oakpark.com/uploads/1/3/0/7/130775368/4789370.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/midaxedewutan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/48795317041.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/78211188180.pdf
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/subuxurazupedekulexorib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3567/2219/files/pizezazuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/resuserawejirujajadewap.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/tixezunak.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/vabetox.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/tinavarikejuturiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/animal_crossing_new_leaf_prima_official_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/zagowigowapuzigoxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/35981715551.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_off000055d1.bin
775b8083ba482c8bd5f422201b6019197129370a5b9373148c7639cf1d2c3f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D1 5380 bytes
font_01_sfnt_off00006803.bin
063bd91cd2d2c7da7f7a18f546b9cf1d76a6b019531d520558f1661943425def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6803 15796 bytes

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