Malicious PDF — malware analysis report

Static analysis result for SHA-256 81679d02684c4fd2…

MALICIOUS

PDF

51.4 KB Created: 2020-07-29 21:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f360208ac216287fed9f69cf1c02819 SHA-1: 586389e60c86d4fdff2e6bbf6dcc029b9fdf4768 SHA-256: 81679d02684c4fd2c5b899f4c261d101f2184eac50b2e5364fc7706302d77f67
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The primary malicious URL, https://ttraff.com/pify?keyword=plural+nouns+ending+in+o+worksheet+pdf, is identified as a redirector. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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=plural+nouns+ending+in+o+worksheet+pdf In PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdfIn PDF document text
    • http://files.bluewatersinc.net/uploads/1/3/1/3/131381539/jukan.pdfIn PDF document text
    • http://files.findingplaygrounds.com/uploads/1/3/2/7/132740536/zatumu-zeteboxaje.pdfIn PDF document text
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.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/1/0429/6127/2983/files/karofatupewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7238/0310/files/29433839823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/95718530051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/vovufubetowexil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/torijuxuzigotelixebuzafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36281161478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/lositaxemosibuzafolibur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/29881495279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/70606259440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/35435766959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/30870942413.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_off0000803d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803D 5344 bytes
SHA-256: b6c3aa5471531e051c6cca70dbad327d912e804d0fd17f7d08baeae92407b88f
font_01_sfnt_off0000926f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926F 14272 bytes
SHA-256: c44c9eb3e13fedd7bb0a4573cfdf538285a6cedd1d9bca8b3391a30c0dba4686

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