Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce8ca75f22a8f29…

MALICIOUS

PDF

46.0 KB Created: 2020-08-09 09:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab0f1225f596f54de08921565e636878 SHA-1: 7e13bef5ea8781128e99398f8e1e61d867da1fa1 SHA-256: dce8ca75f22a8f29163727d96600e032b2e5b03c75d739c6ba69b063adb1d638
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=nutrition+et+sant%25C3%25A9+cours+pdf, which is designed to redirect users to further malicious content. The document body, though partially corrupted, contains references to the redirector URL and appears to be a lure for educational content.

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/pify?keyword=nutrition+et+sant%25C3%25A9+cours+pdf
    • http://files.wildrootsyogawellness.com/uploads/1/3/0/8/130874205/muwig.pdf
    • http://files.ksandizell.com/uploads/1/3/1/8/131856331/ac6dfa26.pdf
    • http://files.millmountaincoffee.com/uploads/1/3/0/7/130776200/fitiredum-lojezososamuwal-labogatik.pdf
    • http://migawuw.mitchellstdental.com/uploads/1/3/2/8/132814930/7007491.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/fexezovuwitisokolasaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/farefaf.pdf
    • https://cdn.shopify.com/s/files/1/0450/3742/0708/files/8304005328.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/darolibakudisesolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/minecraft_0._12._0_update.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/21000548879.pdf
    • https://cdn.shopify.com/s/files/1/0437/7310/0184/files/sikadexewijojemefiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/evs_project_on_green_revolution.pdf
    • https://cdn.shopify.com/s/files/1/0437/5366/8769/files/pi_in_hex.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/dotuwej.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/63027774471.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/bekewulamavegokam.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/20418529844.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_off000071d7.bin
2fd433e96cc161a9ed644dee05feb6d6c69a68d0dc04eee3694dce331a1d7c27
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D7 5228 bytes
font_01_sfnt_off00008372.bin
0edd129b3ab4aee9d468705bd1ef9879b8e5f5eda33c25e5869126d139cc94ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x8372 12008 bytes