Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c71ffc4a8b0743b…

MALICIOUS

PDF

37.7 KB Created: 2020-08-26 12:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9697289087efa267baf810934921dd16 SHA-1: de266b24bdec8df900b076e48641a65d31889df4 SHA-256: 8c71ffc4a8b0743b64e3ef44a4ca7eb769be26ab0dc51abe0b62127d766c6a58
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=barron%2527s+ap+spanish+language+and+cul'. This indicates the document's primary purpose is to lure users to this malicious URL. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO manipulation effort to distribute malicious content. No scripts were extracted from this sample.

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=barron%2527s+ap+spanish+language+and+cul In PDF document text
    • http://files.marinamarinaantiques.com/uploads/1/3/1/4/131483154/4964168.pdfIn PDF document text
    • http://jewurexim.brewstockonlinestore.com/uploads/1/3/1/6/131606577/5196306.pdfIn PDF document text
    • http://files.claridgechang.net/uploads/1/3/0/7/130740438/fewer.pdfIn PDF document text
    • http://files.powerupk9.com/uploads/1/3/1/4/131483282/kuwelor.pdfIn PDF document text
    • http://files.colleenbardelli.com/uploads/1/3/1/8/131856065/gijomagez.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/1/0440/6899/5222/files/48712287922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/mukejobex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/vuwowenixumulukaboxusofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/how_to_hide_api_key_in_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9890/2438/files/sufisofoloba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1804/3040/files/mejokapereba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/29134493506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/kufesajewutunovod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/calendar_app_for_couples_android_and_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/84736427009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/naxapalol.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_off00005489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5489 5420 bytes
SHA-256: 2e529827d5d2dc9cf0c8af2bc800f9d19425880b00987afa794b17939bc678bb
font_01_sfnt_off000066ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 10260 bytes
SHA-256: 8e03f48c7467f06c028ff39f371fe2d8c7ca0bac36f2877cc4429b2b1c425202

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