Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3e3ddfd0cac213…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 05:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d63f5c8f610c21541e4b90941e859c9 SHA-1: 104f636b47e367ba7de35d2de11a207a18b19028 SHA-256: 3f3e3ddfd0cac2133bae2ffe96d19ec5364f3f6f9da0738c91897199d3579ff9
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, designed to appear as book downloads. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=suspense+thriller+books+pdf+free'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=suspense+thriller+books+pdf+free In PDF document text
    • http://files.gallery.allie-coosh.com/uploads/1/3/0/7/130776594/4091519.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/1/0427/7580/6119/files/sodozipip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/30423311642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/senezitelojanoxurexewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/adobe_edge_animate_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0600/0282/files/levedaralesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/43278630346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/19831412640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2046/3778/files/mosawadavakupotojegarunob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/papewobamukomopavimijido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/butterfly_valve_tozen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/mofegamusujiviwatudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/structural_steel_design_5th_edition_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9370/4356/files/valomiputebefezufasinowuf.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 3

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_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 5224 bytes
SHA-256: 8fbf5b0271989e6a2f5d399f19521f1318ebe78c84714ecaeed359acf8d277e2
font_01_sfnt_off00007599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 10272 bytes
SHA-256: 3f47c5e2de3cd10acac42bada6b6f04745cd8bb93462ac98ee4176caa3bafa7d

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