Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4df051bdfaea3f…

MALICIOUS

PDF

59.0 KB Created: 2020-10-14 23:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c654a5758a2c97e11b9977255e36fcb8 SHA-1: ad09a4c0b134a0054bf616059e6505a21afcd0ea SHA-256: 9f4df051bdfaea3f16a9f7a96efeec6fde7a882e83b9b2ae54472e303ad0ff79
194 Risk Score

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://cctraff.ru/123?keyword=google+maps+voice+navigation+not+working+android In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/vanojiraxajerubefiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86fed5b3038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f8758860b40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8735d4c8835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8717442ccae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f870589d91b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86ff7e1f0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f870851d4cda.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/78699c69-b811-48a0-9f6e-11a39e7a7b7b/luwujorezagaxijikiwawuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c2a87e-595a-4114-adc8-64639c8381f4/jagetepanafosemom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4631/7463/files/xegutekibibomaxule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0282/9734/files/81182291041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/10_minute_body_scan_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3008/8349/files/datirekuvave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9c0f77-d318-4fde-80e8-2d26354e46cf/lusazovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee59cf0-77fd-4890-8085-136309273e3b/43599289748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cb8167-fda6-4a94-ac4b-a0378cc49d9b/82573750812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efc6ff0-c0e6-465d-aaec-95fbd2910917/mawixipinajufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62132e94-c77a-4ce7-a0a8-8f996417d8f1/zixur.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000913e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913E 5640 bytes
SHA-256: 94afda674d452887adfbc151f8991fb519eeb18666a57ce6b916483c05395ceb
font_01_sfnt_off0000a473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA473 10412 bytes
SHA-256: 17ddf73c86d016587f7ee8a67ca8238b544a2ddcadd8cb19dc606f95c57753a7
font_02_sfnt_off0000c835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC835 16308 bytes
SHA-256: 6eef40af276a4d555b7e1ad543f9f6d7cd59f7292d63c208002f4aa9ab9165f5