Malicious PDF — malware analysis report

Static analysis result for SHA-256 756e53701831a8d7…

MALICIOUS

PDF

42.3 KB Created: 2020-08-26 09:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c367baf49eb1fdf4e7e5199578fb2655 SHA-1: 26aa5fd661626c8984995b50ae858d577dffaa67 SHA-256: 756e53701831a8d7aa95e583e708daebc1caa233ddc221188f27f44c07d68a81
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a redirector service known for hosting malicious content. The document body, though partially corrupted, includes a URL that appears to be a lure for a 'Kubota l3400 service manual', directing users to a malicious redirector. The presence of a link farm and a known malicious redirector strongly suggests a phishing or scam attempt.

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.club/pify?keyword=kubota+l3400+service+manual In PDF document text
    • http://files.rautoulab.com/uploads/1/3/1/8/131856435/jomefuzu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6776/0028/files/converter_para_word_candy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/ziteli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3183/7344/files/51803922826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/14404334519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/zuwutimuruwezegaxibama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/gaming_mouse_cursors_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/not_about_angels_birdy_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/38025824204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3681/0135/files/54118889665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/59120092080.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574D 5392 bytes
SHA-256: 1353610ec88c7b263533b49c28d23ca527ed5337cffab64685c6db1f9f6a87e5
font_01_sfnt_off0000698d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698D 10824 bytes
SHA-256: 15f97761d74dec2ad93fb59afb4c8a4c98bfa98c28d110cdc18daa725d00d41f
font_02_sfnt_off00008e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E91 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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