Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7403d63fcbe1d7…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 02:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db143e037d0c3f5e3067079ae3b934cd SHA-1: fd3449478e91a76c0912161a0df7db8698a157c2 SHA-256: 1c7403d63fcbe1d7787372bc7c5ccb221c9326d93dd5d1f9831e3f831de438f9
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=cibola+burn+free+pdf'. The document body, though heavily obfuscated, contains text suggesting a lure for a free PDF download, aligning with the malicious redirector's purpose. The ML classifier strongly supports the malicious nature of this PDF.

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=cibola+burn+free+pdf In PDF document text
    • http://fedolejo.iananthonycoleman.com/uploads/1/3/1/0/131070318/39027865.pdfIn PDF document text
    • http://files.bbq4hope.com/uploads/1/3/1/3/131398084/loferazitekex_jisolit_soweb.pdfIn PDF document text
    • http://files.av-id.co.uk/uploads/1/3/1/4/131438228/bumoda.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/1/0433/3810/5000/files/19645985646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9037/8901/files/97205078141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/18669165102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/81344274979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/dubudunuximipijijonalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/95271973229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2901/1359/files/adobe_reader_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/bimimisixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/29512813784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/kixetomuvef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/zadorotelitosufufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/rajuvaf.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 3

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_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 4904 bytes
SHA-256: 713605b7feeedffc2714b209d5fb6d2cbb80e96d3724eda4794f45c66fa23535
font_01_sfnt_off000073d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 10064 bytes
SHA-256: ee3ce5d1816b0107dc2f6a80b29200422a0aeca0487183ba0718f0f693d570eb

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