Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf80081b152a7a46…

MALICIOUS

PDF

41.2 KB Created: 2020-08-03 23:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: db2b3503e6995e706e53acbcb59329f9 SHA-1: be0a0b084b1f2ee10d43c6abb35fe832cfae3cbd SHA-256: bf80081b152a7a46878130f9303106618cd2ecb23ba9639aac1e46b1ad1dc37b
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://ttraff.ru/pify?keyword=physics+of+solid+state+pdf In PDF document text
    • http://files.sccuttingsolutions.com/uploads/1/3/1/3/131382134/8238554.pdfIn PDF document text
    • http://files.neonatalresearch.net/uploads/1/3/0/7/130776601/2b14faf30.pdfIn PDF document text
    • http://files.womensoutdoorweekends.co.uk/uploads/1/3/2/7/132710700/7924301.pdfIn PDF document text
    • http://files.loveittotransformit.com/uploads/1/3/0/8/130815228/kabar.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/1/0434/1583/0695/files/didokodusowazufotadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/24617639092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/velunogutisijotedalikevup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/55642703479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/64780181066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/70483855070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/91826686392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/kigaririsixagidoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3706/3328/files/shrink_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/descargar_abbyy_transformer_pro_3._0_full_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/json_file_comment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/66862603082.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_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5248 bytes
SHA-256: e46320758694b4751226e658075c1e1e7a8718bef78bcc4104793257ed5e0f3a
font_01_sfnt_off000075dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 10124 bytes
SHA-256: 631cdd50e75b794857e0d4e53cb07f8cccb12f07eca68d8ed09fdc630014182a

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