Malicious PDF — malware analysis report

Static analysis result for SHA-256 502394bf7d68c01b…

MALICIOUS

PDF

35.5 KB Created: 2020-10-02 04:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8e371292a4718e343389821ba8f89564 SHA-1: d4967c52cdd67f7b59bb2bdcd56e38c0c4b40f11 SHA-256: 502394bf7d68c01b05316b9cbbf3d4171ccfae74a58aa6290dfd20fc9a9b468a
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=ecg+made+ridiculously+simple+pdf In PDF document text
    • http://gawilosu.bhwhemptherapy.com/uploads/1/3/1/4/131408899/wules-rotezagipuvir-rigoj.pdfIn PDF document text
    • http://files.socalhutchinsonbell.org/uploads/1/3/1/6/131637257/e37b8f.pdfIn PDF document text
    • http://bikezag.sunshinecoastcelebrant.net/uploads/1/3/2/6/132680981/e88b8f7fc10e.pdfIn PDF document text
    • http://files.sfepiphany.org/uploads/1/3/0/7/130776201/7510933.pdfIn PDF document text
    • http://vovila.holicarellc.com/uploads/1/3/0/9/130970023/temiwuxi.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/1/0438/4089/7181/files/manson_floating_reamer_holder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8602/4356/files/sitting_still_like_a_frog_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/supernatural_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6046/5316/files/adobe_indesign_cs2_classroom_in_a_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7284/1638/files/43957377353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ef8cc4-f64b-430d-9250-4934c2b56260/41130288413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb839158-b928-403c-b269-84d28ab088c4/lorene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf25741b-5c17-4474-a3d3-434870fb2eaf/67549841588.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4957 5532 bytes
SHA-256: f60f28adb5774938b3d54563bf43aa095a9b817d7091f73eff84d75123f05f0f
font_01_sfnt_off00005c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C21 10428 bytes
SHA-256: 77de7094e416d7146061c539c8c49be1b437947c00ee4e2f38be76b0982a7b49

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