Malicious PDF — malware analysis report

Static analysis result for SHA-256 b871dfa870e914e1…

MALICIOUS

PDF

50.4 KB Created: 2020-11-04 04:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 63da52f3514699b7f513679f0c68f6f2 SHA-1: 9d403d154600154ab6539af6e0f6c4e6fb4080b3 SHA-256: b871dfa870e914e1a87970df78bd7b5dd92f63b8ce5655e248386456777ba124
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.me/123?keyword=jordison+construction+urbandale+iowa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f9fa88c75cb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_5fa1fe8319ef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f918542c1e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f9908745c17b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_5f982324d7c2b.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/lirerezukerapuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f89b4fc67f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5fa0238f6ff68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8e377cae6d6.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/nalijazi-xipixevaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5486 15392 bytes
SHA-256: ec6fdb56bcf9d80ee73002aff11ffd588add3dd853eb1a0caf54ffa85221d59a
font_01_sfnt_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 5156 bytes
SHA-256: d9f41e845c6e008690dc57398ada7accb67bf6c3a6a6f9fa33aec7bd8e35119a
font_02_sfnt_off0000984a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984A 10776 bytes
SHA-256: 8a6f4010da34f6dd185d024188a091de44ec96cbdacf60e4eb8883ee2d2bb760