Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b162e5e68eab84…

MALICIOUS

PDF

67.6 KB Created: 2020-08-30 20:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01518a3029993123f7f661547529d0ad SHA-1: b7bd6993fd262ec100ad912510568ea390d905a7 SHA-256: 85b162e5e68eab84e6ea01f22a9c328f6391798867c85ddcf3f2bbf9e236455d
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of external links. One of these links, https://ttraff.ru/wix?keyword=digimon+cyber+sleuth+personality, points to a known malicious redirector. The document appears to be part of an SEO link farm, designed to artificially boost the ranking of other web pages by linking to them.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=digimon+cyber+sleuth+personality
    • https://static.usrfiles.com/ugd/b8c837_6585fbecbe004da1bf69349b547f01eb.pdf
    • https://static.usrfiles.com/ugd/7d21c0_0b6f1fbb7dde4c7593a9780340c1b6a5.pdf
    • https://static.usrfiles.com/ugd/b42fd6_0fcf07789a444c7dbf4018833458110e.pdf
    • https://static.usrfiles.com/ugd/b0b521_db5cfea02b024421a5f67036d68b7247.pdf
    • https://static.usrfiles.com/ugd/16a96a_92d6451c9c9d455b803bc79d146c591d.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/fadonesasabu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/juniremibowakibuweniz.pdf
    • https://cdn.shopify.com/s/files/1/0461/6083/8808/files/chrono_trigger_snes_rom_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/wigipetosuregupov.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/boorstin_the_image.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/vizow.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/hermann_hesse_el_juego_de_los_abalorios.pdf
    • https://cdn.shopify.com/s/files/1/0436/5660/9957/files/meteorology_terms.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/15423053340.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/enfermedad_hemolitica_del_recien_nacido_por_incompatibilidad_rh.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a031.bin
ca665bff373f3d41e55aca1b6a8daab7426b5308c7d029364f0a28117d146d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA031 8556 bytes
font_01_sfnt_off0000bca7.bin
991f4ff9fab57e31dfb14d3a7f4261a898f34ba82cd873eda90f08b258720d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA7 5472 bytes
font_02_sfnt_off0000cf14.bin
dd770501bbe483b9b03c3c52eb5a132d4b81fa90caf8e61cec2e3b13441e38c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF14 10472 bytes
font_03_sfnt_off0000f2e5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 4324 bytes

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