Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf527ff2224bae3…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 10:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5797e7b4d11766e5d0828b4a1eb2b215 SHA-1: a1e30d0342779ff61315e7863de15434641b7bf9 SHA-256: 4cf527ff2224bae37fc393833fae4bcb0f68861d957032ef5c2874718f1594ea
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, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation. One prominent link, 'https://ttraff.ru/pify?keyword=how+to+calculate+ammeter+reading+in+a+circuit+pdf', is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=how+to+calculate+ammeter+reading+in+a+circuit+pdf In PDF document text
    • http://files.hcmsystemslimited.co.uk/uploads/1/3/0/8/130814623/datetofoxubusinapas.pdfIn PDF document text
    • http://files.easttntours.com/uploads/1/3/2/8/132814972/1697366.pdfIn PDF document text
    • http://files.sharibatheactor.com/uploads/1/3/2/6/132681579/mikuvusutovavi.pdfIn PDF document text
    • http://medowuf.sweetreesmaple.com/uploads/1/3/1/6/131606186/sitim_piguwijaruru_pewoni.pdfIn PDF document text
    • http://kunefo.guestchefdetroit.com/uploads/1/3/1/4/131453247/685c59e5cedbd5.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/1/0431/4293/8784/files/1155985658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/jizitolijirigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/semantic_ui_cdn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/62537007726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/77095723956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/28139263803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2837/2904/files/ca_icap_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/fidagen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/fozewanoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/jufor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/vitamin_b6_deficiency.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/newafigekezapewewonirodev.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_off00006dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 5352 bytes
SHA-256: 51c255aa1382e1b559c6d63cbf80f2ce521dfd3261f6a596b5e5496a64d76c48
font_01_sfnt_off00008020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8020 9620 bytes
SHA-256: df8bf800ba76715af2f55bc38ee1b2c745e4d3618e378d03b8abfa412dab2d3a

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