Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d103900144b737f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 05:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9eef05c372cab53fbb5575667ca8d068 SHA-1: 4fd4e1d423b230b2a8560da5097f1fdbfcc58b84 SHA-256: 4d103900144b737f65afd9ab12858705a87e38031d3aa6f2b3cf329ff1e4ff91
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=meteorology+today+10th+edition+pdf In PDF document text
    • http://files.cubatrips.ca/uploads/1/3/2/6/132681812/88e7fedc.pdfIn PDF document text
    • http://files.fixfaithsfemur.com/uploads/1/3/0/7/130739746/1847196.pdfIn PDF document text
    • http://files.kingtechnicalapparel.com/uploads/1/3/0/7/130739251/lopinatuzakag-kugawedogix-muzolewetop.pdfIn PDF document text
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdfIn PDF document text
    • http://files.thecoffeechat.net/uploads/1/3/1/4/131438449/movutuxiweku-riwifakil-kewodasasatuz.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/1/0433/9017/3349/files/tudujiwemasoxalos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/nanif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/xozakil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/offensive_minecraft_skins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/speak_business_english_like_an_american_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/24361643281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/the_foundations_of_empirical_knowledge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/29417919888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/doviwizulibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tepumesuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/gejefevemotelufazas.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_off000063c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 5424 bytes
SHA-256: 14e084bc3ec7b0e67ed2ed9a67225dc0020c17b7844ab9c80bbc1136d057e294
font_01_sfnt_off00007642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 9636 bytes
SHA-256: d9b1fe13e0f2469ba2ad63f3c64ed6f643f9debdb45b39bf61dea3f19c85fa43

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