Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f6d5e9f105c4f2…

MALICIOUS

PDF

32.1 KB Created: 2020-08-19 22:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e24dfa23cadb86720655e69c55f74ff8 SHA-1: 77a762874bdf66a53b669f91d475d050580d3893 SHA-256: 73f6d5e9f105c4f23d515ab35a0146bc77560849cca0bdfa01e4d426ea6212dd
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The primary redirector URL is https://ttraff.ru/pify?keyword=reported+speech+exercises+mixed+types+pdf, which is flagged as malicious. The document body, though obfuscated, contains this URL and other PDF links, indicating an attempt to drive traffic to malicious infrastructure.

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=reported+speech+exercises+mixed+types+pdf In PDF document text
    • http://vakaj.eleven1church.com/uploads/1/3/0/7/130738894/sexodewotam_vugibeka_wasinogosup_vobit.pdfIn PDF document text
    • http://dejuxota.cchpcharleswood.org/uploads/1/3/0/8/130814124/xukevoti.pdfIn PDF document text
    • http://files.northportcarpet.com/uploads/1/3/1/3/131382078/2db4601.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/1/0432/1512/6692/files/15478477074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/cells_alive_webquest_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/5050843919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/nedujuwopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/34597157031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/vunojolomusigumewemibawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/assessment_of_teaching_assistant_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/belajar_bahasa_jepang_apk_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/nopote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9423/6572/files/vazefikulipobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/pdf_to_word_converter_download_adobe.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_off000040d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40D3 5332 bytes
SHA-256: 5abd68815d2dd5c9f2a546a0cce456bc0c8f6153155fe65bfbdd652b46f512de
font_01_sfnt_off000052e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E7 9672 bytes
SHA-256: 99945bcb436f086bc0b6040fca2327ac009770e057cebb13b27cd0307a8eb7ec

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