Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1feb1ba85180b1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 00:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bc1e51301953ecabc7e32c0e75f8e81 SHA-1: de5aecd6e9604088c8eb535325c628018df139e0 SHA-256: 2b1feb1ba85180b12c2f918dd934c34a21b5abefa8cd3f5e15932a2715d0258f
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to clothing sizes. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=giordano+clothing+size+guide In PDF document text
    • http://files.callahansclassroom.com/uploads/1/3/1/8/131872054/lapilenanuvap.pdfIn PDF document text
    • http://tojusomud.thechurchtaxexpertsofamericallc.com/uploads/1/3/1/3/131398404/sexujep_gilumopil.pdfIn PDF document text
    • http://guvobas.desireemariedesign.com/uploads/1/3/0/7/130740387/niliduto.pdfIn PDF document text
    • http://files.bbpregistry.com/uploads/1/3/0/7/130776812/givuzikamagununaj.pdfIn PDF document text
    • http://fumumila.runsquadopo.org/uploads/1/3/0/8/130873951/nokoxako_sefawikabuguxos_retox.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/1/0429/4931/2666/files/95891076537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/gexulurot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/mufadefesuzukexesos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/bobamajedikonofovobepulux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/benipuwej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/dajuriluxurewule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/22154755191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/zovukivomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/39365828738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/repakozineze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.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 8

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_off0000531a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x531A 5280 bytes
SHA-256: 7163fc4c1bac7fb6637e75b9504a4fe7cb17e973eff0c424f543f99a5269d925
font_01_sfnt_off0000650e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 14504 bytes
SHA-256: 072ba3bcd2aa2e49c5d1f15cad6b5f09f91cb171e0d2c1820bf5136dfcb02feb

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