Malicious PDF — malware analysis report

Static analysis result for SHA-256 23761d869b9303fb…

MALICIOUS

PDF

46.9 KB Created: 2020-08-12 01:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c72f8d2ebe4cefdb25f945f482ccc919 SHA-1: 3b6a2bb3676b859a37dcd68b39afa7f4b77ddbfe SHA-256: 23761d869b9303fb79f671960b5e3ad995ebfd2307d8aa4849535bda5875716c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=html+to+pdf+base64+image' which is associated with malicious redirector activity. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to further malicious content or phishing pages.

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.com/pify?keyword=html+to+pdf+base64+image In PDF document text
    • http://files.radioramadhan.scot/uploads/1/3/1/4/131453045/7340182.pdfIn PDF document text
    • http://files.divreitorahofvien.com/uploads/1/3/2/6/132682883/6810348.pdfIn PDF document text
    • http://files.heartlandchurchnetwork.org/uploads/1/3/2/8/132814387/a72f5b06681.pdfIn PDF document text
    • http://files.jelanaduncangolf.com/uploads/1/3/2/8/132815960/nelozabi.pdfIn PDF document text
    • http://silowile.krzysztofbobrowicz.com/uploads/1/3/1/0/131069934/f9c057a20c.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/1/0431/4375/7985/files/37796562023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/wedegilatofagoganojajodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/65006409043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/2005_chevy_equinox_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/nerav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/save_chrome_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/veiled_sentiments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/duvenugosokipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/jujonedewajitiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/11907101895.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_off00006c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9D 5608 bytes
SHA-256: 1361899e9045069bc22672f45e0be48c54d37701ef04a7c04ca19384e03bd094
font_01_sfnt_off00007fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA2 15244 bytes
SHA-256: d49cd0617f3b6626f623022245b8646f6ee05bcb1dc57858d457311fae191fdd

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