Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf42f3f2fda97c7…

MALICIOUS

PDF

39.7 KB Created: 2020-08-06 08:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21c989cddf1f75bf4f514ac5bdbb4821 SHA-1: d70dc890e63e8eef1adddf01826ea07609ae9048 SHA-256: 7cf42f3f2fda97c79db74e03129580e2101dad4c3e2a3481dacbfe4087604e46
194 Risk Score

Malware Insights

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

This PDF contains a mass external link farm and a redirector URL, indicating a phishing or malware distribution attempt. The primary redirector URL is https://ttraff.cc/pify?keyword=excel+advanced+skills+writing+workbook+year+5+pdf, which likely leads to a malicious payload or phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious link patterns.

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.cc/pify?keyword=excel+advanced+skills+writing+workbook+year+5+pdf In PDF document text
    • http://files.fivelakescabinetry.com/uploads/1/3/2/6/132681969/2556215.pdfIn PDF document text
    • http://files.napervillebigbandjazzfestival.com/uploads/1/3/1/3/131381677/155788.pdfIn PDF document text
    • http://files.ordernutsabouttella.com/uploads/1/3/0/7/130776150/965631.pdfIn PDF document text
    • http://tedet.lindenweitz.com/uploads/1/3/0/7/130775085/664290.pdfIn PDF document text
    • http://menugoke.reedley4h.com/uploads/1/3/0/9/130969059/3728105.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/1/0431/5670/1348/files/rilikezajizefavox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/66126118274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/92747695793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/barazisefunakep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/dilow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7300/1877/files/wukosutugogar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/32619518877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8581/6217/files/51623646830.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_off00005ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE8 5932 bytes
SHA-256: 12af7510a081acfbfcabe4d97eed37cde94524d469f4e6dd89e46dfaa67bfa71
font_01_sfnt_off00006f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4B 10228 bytes
SHA-256: 4cc321563bfe9d86cd1df38c540e766ae35b698ba0490962d7cdb9f15c0e1dbc

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