Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cccfb54c381d006…

MALICIOUS

PDF

39.6 KB Created: 2020-10-07 12:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8afdde1e5c58dbab96ddecc45dd3855 SHA-1: 3864ef8952db232014c1a388c43b4ef465489a3f SHA-256: 6cccfb54c381d006e7cee74f167a46a4a465a17cfb98c825494420577a9fea99
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cctraff.ru/strik?keyword=dawn+of+rebellion+sourcebook In PDF document text
    • https://site-1043457.mozfiles.com/files/1043457/53817243970.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/56683837081.pdfIn PDF document text
    • https://site-1043702.mozfiles.com/files/1043702/pigovubenakotamuxaminuva.pdfIn PDF document text
    • https://site-1040298.mozfiles.com/files/1040298/2977340934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6623/1458/files/limejidasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9646/0443/files/capillus_reviews_costco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3121/9357/files/dresden_files_water_magic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9267/5227/files/a_burial_at_ornans_musee_dorsay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/tawujizij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8673/6286/files/costco_kirkland_lasagna_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7015/5680/files/waterfall_emerald_pools_yuba_river.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1709/9675/files/zixikeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/armitron_watch_manual_wr330ft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebde7c3a-a21c-45fa-ad46-8c8f2ec945d8/59451003939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463e7b99-ab50-4c88-818e-afb229a646bb/diridike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c67afe-d657-467a-b84b-541b69449424/jidomurewolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f39002d-7d96-4b92-82cf-2e4ec7762114/fokapinizenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98eb044-1020-4e5c-abd4-3ca523d52f46/36826533351.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 5168 bytes
SHA-256: 87c7f4460479449cb951f9411be2686eba39f0c6df0e482c5f3dd6174a29b494