Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dc2ebfd2dcaadd…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 09:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c079d0ee521e0d7a62b37707b0b559f3 SHA-1: f99fd00fb8828a1a3a81685defc3a684d4d000c7 SHA-256: 74dc2ebfd2dcaaddeb46fc1e75f77c78da31c28fbe5333b644b6fa9717d6679b
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to a redirector at 'ttraff.ru'. The document body, though obfuscated, contains the same URL, suggesting a phishing lure for a fake answer key. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=discovery+education+science+techbook+answer+key In PDF document text
    • http://files.cobramlawntennis.com/uploads/1/3/2/6/132680870/lemariwaxapufoz.pdfIn PDF document text
    • http://levufiw.stjohnsuccbatesville.org/uploads/1/3/2/6/132681504/lituwijus.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/1/0433/2571/8678/files/segavobowilitufokako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/software_assurance_maturity_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/unity_console_log.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/anfotericina_b_complejo_lipidico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/stained_glass_sheet_suppliers_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/13710829022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/turetunamanadotuvijivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/48337800249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/munenivugotomixuvalomup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/50897206814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/dofuzixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/criminal_movie_songs_ringtones.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 2

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_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 5452 bytes
SHA-256: 8dd1584db4db5dfbb3e32f9806d1e5ed22e4c63a24988f80b3970703b60ce166
font_01_sfnt_off00007523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 11064 bytes
SHA-256: 25e02f10efc0089f7d79c71e609b116956d381b74873f955613e82b30fb1e46d

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