Malicious PDF — malware analysis report

Static analysis result for SHA-256 3172d8913fa2e378…

MALICIOUS

PDF

33.3 KB Created: 2020-08-07 03:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6bcd650780eaa3ad3d621c0daa934fcf SHA-1: 6bd304c51e333c0b475196f32ac7d8ab326910b9 SHA-256: 3172d8913fa2e3788ebb82149c6a190b911b3345b85626e604d11ee42d95b30e
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=autocad+interior+design+book+pdf'. This indicates the document is designed to redirect users to potentially harmful content. The file also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs, suggesting an attempt to manipulate search engine results or distribute content through a seemingly benign platform before leading to the malicious redirector. No scripts were extracted from this sample.

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=autocad+interior+design+book+pdf In PDF document text
    • http://files.huucsb.org/uploads/1/3/1/6/131636689/5488233.pdfIn PDF document text
    • http://files.teamhozie.com/uploads/1/3/0/8/130813489/d47b483.pdfIn PDF document text
    • http://files.sunriseonlinenews.com/uploads/1/3/2/6/132695546/pexidoluzapafepabiso.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/1/0436/6984/8217/files/mapa_distritos_portugal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/ielts_band_9_essay_samples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/furosemide_pharmacokinetics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/ecocardiograma_transtoracico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/merge_intervals_leetcode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/bahaya_penyalahgunaan_narkoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/98994023209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/sudepivosebevawizuruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0703/9897/files/litizulijatixebifaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/wokam.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_off000045fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45FB 5484 bytes
SHA-256: 9b902005a58364450d58a9665e930956c8641aec865651c00ee699048278e296
font_01_sfnt_off000058b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58B4 9340 bytes
SHA-256: f9668b6427d9173de28ea5ec04b3a59e562aae67f1f0d06a22d6103108512704

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