Malicious PDF — malware analysis report

Static analysis result for SHA-256 446eed63c79b1fd4…

MALICIOUS

PDF

56.1 KB Created: 2020-08-19 05:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a048ea04c86ef379156f11901510dfe9 SHA-1: e6ed95868eb4d47a14ad22a9a03f5b990dfcea59 SHA-256: 446eed63c79b1fd4c10c5c6c793c059e043a1e06b1deadfaa886b97c3fdf3e43
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=aviary+pro+mod+apk'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links further supports a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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=aviary+pro+mod+apk
    • http://files.caninesmovingforward.com/uploads/1/3/1/3/131380456/vivogejerokevopirun.pdf
    • http://files.saltyrein.com/uploads/1/3/1/3/131383791/nikebovavomo.pdf
    • http://files.caninesmovingforward.com/uploads/1/3/1/3/131380456/vivogejerokevopir
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/86732918774.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/2019_movies_on_netflix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/sixederipavekerej.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/mathematical_analysis_by_tom_apostol_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/xavorejilofijefidi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/mupiraboginifuvowosaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/947045373.pdf
    • https://cdn.shopify.com/s/files/1/0429/9148/5091/files/cheriyal_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/83534417067.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/gidixudidofosavenatuga.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_off0000970f.bin
cf4a8c55343cef1435628b46f1a8e70c1a0195afb038b238a4efb727dd30ac4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970F 5112 bytes
font_01_sfnt_off0000a869.bin
87f1d840175ae7a571406e7e108ae4f8856ea1fc1eb674d61ce68c1790a125b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA869 13832 bytes

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