Malicious PDF — malware analysis report

Static analysis result for SHA-256 8686cfa1f8bbd166…

MALICIOUS

PDF

39.2 KB Created: 2020-08-16 21:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93c4625888c4dc91150ee740043dcfb8 SHA-1: a19848954f94253473f8f302814305ed271d5881 SHA-256: 8686cfa1f8bbd1667b86bffb9638b84250103fa74dabd9fef954e86de261873d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains multiple heuristics indicating malicious intent. It embeds a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=hydroquinone+msds+sheet', which is likely used for phishing or distributing further malware. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content through a link farm.

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.ru/pify?keyword=hydroquinone+msds+sheet In PDF document text
    • http://files.kamelotrose.com/uploads/1/3/0/8/130873995/6741464.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/1/0433/0687/7080/files/53295895336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/xituzumineniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/tired_anime_boy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/29274465958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/tofulidezulukokibetizinel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7763/9071/files/algebra_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/certificate_of_australian_origin_form.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 1

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_off00005bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 5012 bytes
SHA-256: ea0fe71566187642018f25c4dd6479cf04056e7ef338441e08e6aac38413314e
font_01_sfnt_off00006c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 10668 bytes
SHA-256: b5db2bc904e087404b960d05995588a63ef7494fc36387a7b443e2e97f868876

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