Malicious PDF — malware analysis report

Static analysis result for SHA-256 863af9cd57ff3a00…

MALICIOUS

PDF

42.2 KB Created: 2020-09-16 00:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03318e01aa702f02032916616facb704 SHA-1: e1262ade407607e6911ceeffc34a0a720a75c356 SHA-256: 863af9cd57ff3a009423c5fb298692792464ee1f58e17f3fb84d9d52c81bf839
210 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, designed to trick users into downloading further malicious content. The document body, though partially obfuscated, contains a URL that points to a malicious redirector, likely intended to deliver a second-stage payload. The presence of urgency lures and download buttons further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=collin%20county%20jail%20inmate%20funds In PDF document text
    • http://visakorek.carolinasiscebs.com/uploads/1/3/2/7/132711973/rafijir.pdfIn PDF document text
    • http://kodivuw.cherylanncooke.com/uploads/1/3/2/8/132814969/7328749.pdfIn PDF document text
    • http://bitikipap.asbestosmasters.com/uploads/1/3/2/7/132712115/dizufotilawagawon.pdfIn PDF document text
    • http://difobed.4lifecapital.com/uploads/1/3/2/7/132710507/2af1fd5c.pdfIn PDF document text
    • http://romupixo.conciergepainrelief.com/uploads/1/3/1/4/131406515/zomojunurumivo-rigonoliniwar-vinalumog-nesuzevopodirug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b48b60_4ff70740acbf4492a079bce6bc597ad5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6290de_a58554fe82124a0ca68d1d4ad4a3271e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/948cea_2004f0ac36aa4b0eb1bf8e80f93187a4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/alto_sax_music_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1239/0821/files/betternet_vpn_free_for_windows_8._1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3758/7613/files/national_action_plan_2014.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AD 5156 bytes
SHA-256: 4a74d21d0848f04fd31eb7a3365438d5b70d9a1228580fc62068b984a157c4f0
font_01_sfnt_off00006a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 10476 bytes
SHA-256: 1f499ef5afc63dd121ed95919b60bf127576b2af080234ad79d3fd862ea23d9f
font_02_sfnt_off00008e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E12 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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