Malicious PDF — malware analysis report

Static analysis result for SHA-256 833d160f097c3f1b…

MALICIOUS

PDF

38.2 KB Created: 2020-07-28 06:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6296d8d9f722624579487f470e31740a SHA-1: ed5e41a7526f98a4c577d84df9f4027ee495ef98 SHA-256: 833d160f097c3f1b040e72cddcc54d9d983b17f464a0455b4dff67d31209a214
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to appear as legitimate download sources, but they redirect to malicious infrastructure. The primary redirector URL is associated with known malicious activity and SEO link farming. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

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=aimp+player+android+skins In PDF document text
    • http://files.courtneymmartin.com/uploads/1/3/0/8/130814459/duzuwinolu.pdfIn PDF document text
    • http://files.westtexasguitarfestival.com/uploads/1/3/1/8/131856232/2b5164.pdfIn PDF document text
    • http://files.thehot-boxcompany.com/uploads/1/3/1/3/131380547/motudo.pdfIn PDF document text
    • http://files.opccdoc.org/uploads/1/3/1/1/131164386/b3dd348df4d2127.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/1/0433/9492/4700/files/toxeregikozegog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/rajivolubujobonovenuduvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/55689919845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/zasusovadifigadubejejabim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/womavujeximonuzara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/853682724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5158/0568/files/dulapokesuxigedatixis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/tirew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/zaxowusasodit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/34367105657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/23785373364.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_off00005a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A16 4968 bytes
SHA-256: 57ee958a73364cc0bc9f80faf734bc9916e31244c2cc19ffbff7fdea88307db4
font_01_sfnt_off00006ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD4 9572 bytes
SHA-256: 7a46acc0532030b4f409005b9548bcb294872cb7698e38b6500d1eef66cab1e3

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