Malicious PDF — malware analysis report

Static analysis result for SHA-256 640f098de2443382…

MALICIOUS

PDF

39.7 KB Created: 2020-08-27 13:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66c5b5edff14da245de3147db975c670 SHA-1: fa73d9adb9717a979497ec3b4ea4438cb16a3dfd SHA-256: 640f098de24433822de6f235819ab207a143a56991d4b5a0c56d17795fb0be70
194 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, including one pointing to `https://ttraff.com/pify?keyword=analisis+morfosintactico+2+eso+ejerc`, which is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=analisis+morfosintactico+2+eso+ejerc In PDF document text
    • http://files.middlesexmachines.com/uploads/1/3/2/7/132740362/merifesokubevuj.pdfIn PDF document text
    • http://pewujetog.sikhheritagegroup.com/uploads/1/3/2/6/132696056/cdd73ca1.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/1/0428/9835/8432/files/58097506778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/renekanuvonujizato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/technical_communication_10th_edition_mike_markel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/18433754648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/87486074672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/1652137067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2040/2336/files/39590343535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/marriage_anniversary_cake_pics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/51852347956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/78904226238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/cvx_earnings_date.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 1

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_off00005a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 5224 bytes
SHA-256: c4be906441ee2ad6f6d106920f3568d3eebe46be0137eea17bc57d77ff045b3e
font_01_sfnt_off00006bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 11304 bytes
SHA-256: d29660d4dd11a8b2ac6a47c40a930eb21b4cda3e0f01c776ecda2bc477c57e52

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