Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b579322a9595b8…

MALICIOUS

PDF

49.6 KB Created: 2020-11-08 11:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e8ebbb944c99379c4c4c93f30997f8d SHA-1: efc3798a69df9218f318b96d42c0cf7b572a09bf SHA-256: f4b579322a9595b8dd2f159af4db9052db05a2692c9f7eaf04ac3ee89ac9dc1b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/aws?keyword=narrative+paragraph+examples+pdf', suggesting a lure to a malicious site. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://gettraff.ru/aws?keyword=narrative+paragraph+examples+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdf
    • https://vexidip.files.wordpress.com/2020/11/sources_of_error_in_titration.pdf
    • https://s3.amazonaws.com/bulikowexunepov/apostila_atualidades_2018.pdf
    • https://s3.amazonaws.com/wilugugo/lokizepemozajapagafi.pdf
    • https://s3.amazonaws.com/divexikav/off_sides_sawyer_bennett.pdf
    • https://s3.amazonaws.com/mejawiwomak/doyu_8_ball.pdf
    • https://tumitom.files.wordpress.com/2020/11/kowawixegozup.pdf
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdf
    • https://uploads.strikinglycdn.com/files/08f7ba5f-9bec-4ac9-bcff-341496537faf/retractable_lego_hidden_blade.pdf
    • https://s3.amazonaws.com/pomaxa/45445618299.pdf
    • https://s3.amazonaws.com/zetare/te_pintaron_pajaritos_en_el_aire_cumbia.pdf
    • https://uploads.strikinglycdn.com/files/7fe90ec9-c411-4031-8694-a7aa7a073475/wow_tbc_paladin_leveling_guide.pdf
    • https://s3.amazonaws.com/wonoti/25738617898.pdf
    • https://rotizam.files.wordpress.com/2020/11/wefapedalinaxamosunozof.pdf
    • https://uploads.strikinglycdn.com/files/fb6cc9a7-a5b6-42c8-8da2-5763cb2ea7ee/bujoluvizumul.pdf
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000955a.bin
89765dab54e672fce0c4d9f17cf535ebe6a5c416fc8de5f1286daeada3cbaf5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955A 5552 bytes
font_01_sfnt_off0000a823.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA823 3720 bytes

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