Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f630e1ef5e36eb…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 20:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5a400d836ad7da37f4ba9e7878e3ad6 SHA-1: 1c46879b10a17c5a014113d80f12f4f395d6a542 SHA-256: 27f630e1ef5e36ebd1318c80dc1fef3340a4b9b458e7f5124d92099a96c9dfb8
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary redirector URL pointing to a known malicious domain. The document body, though heavily obfuscated, contains references to the redirector and other URLs hosted on Shopify and custom domains. This suggests a strategy of SEO poisoning or a phishing lure, aiming to redirect users to malicious content.

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/pify?keyword=free+basic+budget+spreadsheet+excel In PDF document text
    • http://files.custom-mfg-eng.com/uploads/1/3/0/8/130815058/pojepuledetizob-tukapawuvav-furetet.pdfIn PDF document text
    • http://files.heartbrake2breakthrough.com/uploads/1/3/0/7/130739892/967682.pdfIn PDF document text
    • http://files.xinzhangdesign.com/uploads/1/3/1/4/131437676/valazamojox.pdfIn PDF document text
    • http://files.uusl.net/uploads/1/3/1/4/131408170/1284853.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/1/0438/3938/9856/files/nesowopozanotubidikabije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/equilibrio_acido_base_en_el_organismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/kilowivowudotufazojowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/91674195322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/biological_warfare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/wupitefanesesoretijebuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/redifeselamekipivexij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3415/6967/files/peliwaruzetivixoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/11860541666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/14390439746.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_off00005f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 5496 bytes
SHA-256: d7055e3162917d89e93c87a1cb7b125f52aa0d5457fa97a33c55e587b18952af
font_01_sfnt_off00007238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7238 10044 bytes
SHA-256: d276779995bcc72a39475966c76a29a2e2088ec7b6bbdeb2df097e8a59dd5330

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