Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1a5d45d803f24b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-26 06:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd2c5ee051da696d10cd14d3b55a037c SHA-1: e0624a189a3c6c4812374e8790444d0f1a86aa88 SHA-256: 7a1a5d45d803f24b2d7894947683d72619056e4bd2eef1efbaa16ed01d238df6
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one prominently leading to a redirector URL associated with malicious activity. The heuristic firings indicate the PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to host malicious content. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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=convert+fp3+to+pdf In PDF document text
    • http://files.caddiskreekdesigns.com/uploads/1/3/2/7/132712358/1275597.pdfIn PDF document text
    • http://fojoji.dsconway.com/uploads/1/3/1/4/131408100/kixajiwo.pdfIn PDF document text
    • http://files.walkersvillehistoricalsociety.org/uploads/1/3/1/8/131871717/zugenuw_xapukijere_xegug_kebesaza.pdfIn PDF document text
    • http://dugar.ohiodistrictaljc.com/uploads/1/3/0/7/130738568/9701304.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/1/0431/9143/5422/files/2422114326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/tivazalubat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/redasegolajalisis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1520/0158/files/55234559342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/edward_said_out_of_place.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/remove_watermark_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/dichotomous_tree_identification_key_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/23008163742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/biztalk_server_2020_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/87687640701.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000503f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503F 4600 bytes
SHA-256: 52b5fe8a704420d9418b380ac9a28cde3706990dd628bcba5b720f7de1f93b52
font_01_sfnt_off00005ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 9776 bytes
SHA-256: 329446eb1d9390d1b5c7c372676511d57bf6ff4c131588cdf1d66cb187f3c5db
font_02_sfnt_off00008175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8175 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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