Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7542a6558b71e4c…

MALICIOUS

PDF

32.9 KB Created: 2020-08-28 15:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b8b9ed3ae6f54c73ae23c47368c651f SHA-1: 7226247bda65ef2c48fa802c8f559f6d79197f3b SHA-256: b7542a6558b71e4c9ae885d8b220bb545fa338d9b53e8d071787269a1ff6171d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate this is a PDF link farm, likely designed for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. 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.ru/pify?keyword=tripkolic+g%25C3%25B6zlerinin+ye%25C5%259Filini+%25C3%25B6zledim In PDF document text
    • http://files.torontopostponed.com/uploads/1/3/0/8/130813859/medosemaluxa.pdfIn PDF document text
    • http://files.ginotorres.com/uploads/1/3/2/6/132695663/towijudisisonab.pdfIn PDF document text
    • http://files.cookiesthenmilk.com/uploads/1/3/0/7/130776757/f9d1d9583f.pdfIn PDF document text
    • http://files.theellarosegallery.com/uploads/1/3/0/8/130814298/41d700db4a47.pdfIn PDF document text
    • http://dowov.amandagretschot.com/uploads/1/3/0/7/130739845/5896801.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/1/0434/1317/6469/files/fanuwefizuzurije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2718/4281/files/juruzipudiwejenavorixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/4422/6460/files/83747055757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/fundamental_of_structural_analysis_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/18244904241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/sopuzexarezonupuxib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/devomujatejixawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2000/1178/files/xosamuwemusolome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/adding_decimals_worksheet_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/naratajojakuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/75286852903.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_off00004534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4534 5556 bytes
SHA-256: 29f8717cf87a5f0570d62e448a688b4c344501c3322667b0a7cd585b28dd17c7
font_01_sfnt_off000057ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CA 9020 bytes
SHA-256: c85eb2c537c97ea1475ee68f827d96118fdba479f7259e5925aa5164302f91a9

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