Malicious PDF — malware analysis report

Static analysis result for SHA-256 034f8499beb2fc0d…

MALICIOUS

PDF

37.0 KB Created: 2020-08-28 07:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 275c05f667092ec616231abc5e99babc SHA-1: 2bc67fefba72175788ca9bf700f34d3e67f47717 SHA-256: 034f8499beb2fc0d856bd249e8a7a069219f016c774e768620258b84474753d5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service that ultimately leads to a malicious URL. The document body, though heavily obfuscated, contains the primary redirector URL and references to other PDF files, suggesting a link farm designed to lure users. The ML classifier also strongly indicated maliciousness.

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=modern+labor+economics+13th+edition In PDF document text
    • http://gever.mclewis63.com/uploads/1/3/0/7/130776068/4828831e4.pdfIn PDF document text
    • http://files.afchoir.org/uploads/1/3/1/0/131069869/xaxebababot_zukejomovujub_jazuz_jibonef.pdfIn PDF document text
    • http://files.anewleaf4you.com/uploads/1/3/1/4/131454345/wixurobelajeku-ziwesikip-viratikomugotot-xijurofiwujax.pdfIn PDF document text
    • http://wozur.yurigiorguanime.com/uploads/1/3/1/4/131406893/b9aae95817.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/1/0432/8990/3264/files/8191757873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/vutuderonaporabokexuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/nisajutiwelegotirof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/no_colbert_report_last_night.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/vekekanuvosuraxale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/tuwaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/bumemilasuzosimutiwibike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/98294659634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3159/2092/files/vray_material_library_for_3ds_max_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5468/5599/files/visefanusekopemi.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_off0000544c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x544C 5540 bytes
SHA-256: 8b3cc2180a783236dd9dd7aeedcedd30435c46a224417a0bc0fc66e4bef0d83d
font_01_sfnt_off000066fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 9516 bytes
SHA-256: 368584400f7bf149345b89df7b4f1c4a2c48ab558080fbafdbb058bdd0b2a364

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