Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b83d505a8d11ee6…

MALICIOUS

PDF

57.9 KB Created: 2020-09-30 10:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9e9a3abc064dfa2f6efcf3c85364865d SHA-1: 7497890f497d5a66dcdd7bd45cc937565254577f SHA-256: 2b83d505a8d11ee67e764c63a67184c99bf500edd2ad81a8d199c357ce3c86b1
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://gettraff.ru/strik?keyword=categorical+data+analysis+third+edition+pdf In PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/dukadikixurejokejimezezix.pdfIn PDF document text
    • http://files.mrpadilla.net/uploads/1/3/0/8/130813992/dbb77cc8d48.pdfIn PDF document text
    • http://files.impactsupphut.com/uploads/1/3/0/7/130776420/1169071.pdfIn PDF document text
    • http://bageva.protectplayanow.org/uploads/1/3/1/4/131438572/7916403.pdfIn PDF document text
    • http://jafuropu.mrspreece.ca/uploads/1/3/1/4/131453870/c0582.pdfIn PDF document text
    • http://files.ernn.com/uploads/1/3/0/7/130775660/37ed878a98375.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/1/0437/9413/7249/files/30408321780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/siwemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2654/5820/files/vutinixixuzegasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/87749093337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.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_off0000a273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA273 5424 bytes
SHA-256: 972d3414e88a8246490ef41d63e2691d16dd5d09aea64615cd3261bf77e2697b
font_01_sfnt_off0000b4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E5 11424 bytes
SHA-256: bc1d76296073769055149793e524ba770dd91a8b1f92ba45698882ffc9b1b433