Malicious PDF — malware analysis report

Static analysis result for SHA-256 50493dbbf19f3b77…

MALICIOUS

PDF

55.7 KB Created: 2020-08-30 23:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ec6924f96be916b739276161750b5a4 SHA-1: db73f481a778098f7b6d29ad4dc54bb5b299d801 SHA-256: 50493dbbf19f3b7741d7172aa1b7b3a87ed46977065314219ad81af8d4c3aa84
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to firmware updates and includes the malicious URL. The presence of a large number of SEO-optimized PDF links hosted on Shopify suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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/wix?keyword=optiarc+dvd+rw+ad-5680h+firmware+upd In 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/1/0464/2753/7560/files/85160246607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/litofib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/toyota_prius_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/67591675836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/pisuvuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/87831616889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3904/7336/files/46852274850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/xopurobabufedizanewuzujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/28723949325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/91304899775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3054/3512/files/21524114833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/megodugiguduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7724/5859/files/candidiase_esofgica_tratamento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/uluslararasC4B1_ekonomi_ders_notlarC4B1.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 7

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_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 6008 bytes
SHA-256: f25eca858b58e0bc9fc39c9d1ec5dce4b2f49786e695910973e8bc10e5bdacf9
font_01_sfnt_off0000a378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA378 15012 bytes
SHA-256: 4868e2d2cf88bf2eceb731ea7c60826f28d7d69c5ae5736cf9ec842b02a58288

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