Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b19db4a360f6bf7…

MALICIOUS

PDF

231.3 KB Created: 2020-07-29 21:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8183d1f6edd53fe220c60924dc77ea2e SHA-1: 2cebf2e2b6360b828a90300d5c750f9ce95ccfbf SHA-256: 5b19db4a360f6bf76db2784de257f60eff31dd8a5d06063c3e96f2dbeca85d21
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a malicious redirector, specifically designed to lure users via an SEO-based link that appears to offer a free download. The primary URL identified, https://ttraff.ru/pify?keyword=cell+injury+and+adaptation+pdf, is flagged as malicious. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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=cell+injury+and+adaptation+pdf In PDF document text
    • http://files.mishpuchacamping.org/uploads/1/3/0/8/130814110/318027.pdfIn PDF document text
    • http://files.tnsportsfoundation.org/uploads/1/3/2/6/132681392/keduvesivizopis-moxevinogem.pdfIn PDF document text
    • http://files.beitersdepartmentstore.com/uploads/1/3/0/8/130873822/ruker.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/1/0435/7518/1471/files/vakelazadasom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/62819530011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/80994344682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/mopuvabinite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3699/9833/files/68143036195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/merusokelufisanajusizuvul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/62034724397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/68545090756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/lizupilojexivavo.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_off00034af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34AF5 4940 bytes
SHA-256: 3c4fd45a3b46f016b5869ae2610ce84970dbb8caa675c98f86fb09692c30af9b
font_01_sfnt_off00035bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35BDC 16500 bytes
SHA-256: 3990659d0c30e72db82e76b89af01620760224fc0bd8585c7186ac239859e2d9

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