Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8cb267e1bafbd4…

MALICIOUS

PDF

36.8 KB Created: 2020-08-06 21:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61193a872dd5b69f0fbc8e012abf6cab SHA-1: cc7b88e01cb912cb9b1f4c4257d67862164aa49c SHA-256: 6a8cb267e1bafbd40ab84faaaa327b26225040ab10472cb9cff61fb95dadfbd3
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=ascending+and+descending+order+worksheets+for+grade+5+pdf, which is known to lead to malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking it. The ML classifier also strongly flagged this PDF as malicious.

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=ascending+and+descending+order+worksheets+for+grade+5+pdf In PDF document text
    • http://files.nyacklibrary.org/uploads/1/3/1/6/131636845/popotikozekiraj-pizuko.pdfIn PDF document text
    • http://files.asthewoodturnzne.net/uploads/1/3/0/9/130969037/18022.pdfIn PDF document text
    • http://files.800logiccor.com/uploads/1/3/1/3/131379343/zanadumawag-zasiku.pdfIn PDF document text
    • http://files.wayfinderlifecoaching.com/uploads/1/3/1/3/131381021/lukom.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/1/0427/7737/8972/files/4209448585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/71513701159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/77070235886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/77047970928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/18932999421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/wapofevosavufazukevogaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/how_to_convert_to_csv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/s10_v8_swap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/35961994713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/98256761935.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_off00005081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5081 5656 bytes
SHA-256: 8f96da96317add4dd5122d50d87cba0063f4161d979f44582abf070af9054d90
font_01_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 9912 bytes
SHA-256: 0811bbe310223688aa0f16f790690ea6fd13106845444cc286636b61e616b4ca

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