Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6f31adaaa439f1…

MALICIOUS

PDF

55.0 KB Created: 2020-09-22 07:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03fba7195b43ae150802deab72b19e8f SHA-1: 56bb1fd184b16ed57e4087734ae849a0aae8c0e3 SHA-256: ca6f31adaaa439f1c137ded47414ab3d36a29d57f09f1c023ecdc5f05fe87f66
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.ru/wb?keyword=mass%20effect%203%20class%20guide' is a primary indicator of this malicious redirection. The document body contains garbled text but also includes the same URL, reinforcing its presence.

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/wb?keyword=mass%20effect%203%20class%20guide
    • http://files.southernpreowned.com/uploads/1/3/1/4/131454034/jikox-vigojovu.pdf
    • http://najemed.jbarneslab.com/uploads/1/3/0/8/130874161/ledumuro-wajogone-wegejeji-gototek.pdf
    • http://rapuja.barbaraesanderson.com/uploads/1/3/1/0/131070705/metigonetuzafep.pdf
    • http://vuxokeju.eastpauldingyouthfootball.com/uploads/1/3/0/8/130874575/6e8733e206103.pdf
    • http://mevopibog.flylightyoga.com/uploads/1/3/1/4/131438562/suwigolewel_dovuv_surazixawe_liburufiw.pdf
    • https://0e9485d8-e501-4575-99f7-330903d1aac1.filesusr.com/ugd/5e5b2a_e3a91f1f091848a187154c8c9ec5f364.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/68731606950.pdf
    • https://cdn.shopify.com/s/files/1/0438/1186/4738/files/15861196803.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/stats_modeling_the_world_3rd_edition_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/zabulodikolirulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/pioneer_deh-_3400ub.pdf
    • https://cdn.shopify.com/s/files/1/0448/4068/1633/files/so_big_so_small_lyrics.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_off0000978d.bin
fc2e4202e96b3c266d77df01d0cc563bd09d0128ce8d085d23ea83cc1033863f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x978D 5264 bytes
font_01_sfnt_off0000a993.bin
4754e5a8eb3e97222315514f5874c357d96075ba5e298ccefdf59f1988690cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA993 10972 bytes

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