Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafa2c5aef3efb06…

MALICIOUS

PDF

41.8 KB Created: 2020-10-11 19:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 039e3e9efa622c09fcbd861b3601c6d4 SHA-1: 120dfbaeb7820baa0f216c4f13dc7e079f54cb20 SHA-256: cafa2c5aef3efb0673c0169a6c66a453a9ae7ed909be482d59961ad90255c002
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/strik?keyword=gold+gym+trainer+420+treadmill+manual In PDF document text
    • http://mawajud.realinboundconsulting.com/uploads/1/3/0/8/130813528/somutexafila.pdfIn PDF document text
    • https://site-1041381.mozfiles.com/files/1041381/tajikapivozapitagijuv.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/kopusev.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/1/0483/3709/2771/files/gakoturotuporabex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9353/3886/files/dimogekataxumegunevewadog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8320/9633/files/boom_boom_volleyball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/400_grams_to_pounds_baby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/bobiredonoluvonotikujijuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5547/5607/files/80726020781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1587/2927/files/los_callejones_los_angeles_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7383/5686/files/sodium_carbonate_hydrochloric_acid_titration.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_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 5464 bytes
SHA-256: 4107bccfb85c687055a909a623868366e1907d75b7339fafe9acbab9e0c8ddd5
font_01_sfnt_off000076a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A6 10572 bytes
SHA-256: 97f298efd0dc7cbda86eb3c46b91ba2e830a34c44e22597947cc7201bd39e4e9