Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6573893429f1e0…

MALICIOUS

PDF

41.7 KB Created: 2020-10-28 00:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b66cd051c5b6f15b797d36ca956a0981 SHA-1: 25a9f008ec07007a6ddc0ee85863627afe83c3f8 SHA-256: 1a6573893429f1e0f9b08e761403f18dd3269d789123dc975aafcba9e59d3280
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically pointing to 'gettraff.ru'. This indicates a phishing or scam attempt, likely using a lure related to 'Deion Sanders shoes Nike' to entice clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms a malicious intent to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?keyword=deion+sanders+shoes+nike In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87197c68a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_5f9730570d885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_5f945be6bb54b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f90149aabacb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5f8db880b2a1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b8a4b8-7287-4b4a-8cb6-095842682ca4/564659477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe394622-09cc-4c33-88cb-7f39749ec3d1/muluzozidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10e4381-813e-4859-a0bc-cd4420a1d432/fetakudelag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8034/4246/files/like_app_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4310/0069/files/paulo_freire_pedagogia_da_autonomia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9da21c1-fee9-4034-89ef-aa0678de5ffb/fallout_4_remote_explosives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55b927a-5b78-4063-916b-bc19963c8985/semotigekurejig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909e4eee-fe87-439c-9283-33613d5fb1ee/73675207859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a708e6d1-10cc-4d77-811d-059de8cd66de/22851500387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5483f36e-6971-480f-b378-cb2eed882c42/26091824094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e89656-92ba-4fbd-974f-21b4a3901ba2/67571985289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46fae1da-26dc-464d-a382-60e8927c46b7/16305829159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e828075-1af0-4e59-9345-dd929d923ea1/foxfire_book_6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 4944 bytes
SHA-256: 00e291980db053b93be2b455abfae1a09b20088fb906da15e2bcebb36bf82b2a
font_01_sfnt_off000075d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 10404 bytes
SHA-256: 2ee15cdca2ba968fc32be673d0aab9b6af3cab6688c5f4d126e2dce2efc4ab9b