Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c458904f841f0b…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 04:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5b4a7dbf89d1f42909e4e68b207b5bd SHA-1: 48e9bc33395233c7118b5a2cca6088c94a8b3a0f SHA-256: 72c458904f841f0bbdf741d090c64efc102382adfd845cd2ab30272f1cc654d2
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a redirector infrastructure designed to host SEO link farms. The primary redirector URL is https://ttraff.com/wb?keyword=mixed%20model%20assembly%20line%20balancing%20pdf, which likely serves as a lure for users seeking specific content. The ML classifier strongly indicated maliciousness, and the presence of a redirector link farm suggests a phishing or malware distribution 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.com/wb?keyword=mixed%20model%20assembly%20line%20balancing%20pdf In PDF document text
    • http://files.plaincommunitychurch.com/uploads/1/3/1/1/131164462/05d9d999b48ea82.pdfIn PDF document text
    • http://files.skagitcohousing.org/uploads/1/3/1/4/131407089/e3da2f50f.pdfIn PDF document text
    • http://vazewuke.fsjcaledoniaclassic.com/uploads/1/3/1/3/131398222/buvidebevogumatunu.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/1/0438/6055/7984/files/agatha_christie_and_then_there_was_none.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/bulk_delete_twitter_likes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/rujorosutijikari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/woxesudebivazowazedafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/the_history_of_america_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/26890101873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/92858163188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/dymo_labelmanager_160_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/vetaxokasusekatov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/kesonatajewolud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/building_community_in_the_classroom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/nokenutazirodufebulezul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/77996850096.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 5

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_off00005f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 5696 bytes
SHA-256: 4692df9a5682978acca44b8f1c75823c5e0bc1ef767ccdd6bbbfe656cfc2f9d3
font_01_sfnt_off000072da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DA 9980 bytes
SHA-256: 30b2e60e752f1b9190fc03b156c49b626e66f3addbf9e130568baf95cdc6ac07

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