Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c39d7ab82ebdf1f…

MALICIOUS

PDF

115.9 KB Created: 2020-08-24 19:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 55cb80f966e9487bc27031a165ad5ad9 SHA-1: 9c91637c80cd38d3d992ab557edcd5f91e04ba69 SHA-256: 5c39d7ab82ebdf1ff98f7c86acac91d4f8888fbbe79381b493583fa8966f35e9
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, including a critical finding for a link to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the primary malicious redirector. The presence of numerous PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to obscure the malicious destination.

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=t%25C3%25BCrk%25C3%25A7e+okunu%25C5%259Flu+cev%25C5%259Fen+pdf In PDF document text
    • http://files.talkyogaslp.com/uploads/1/3/2/3/132302963/2671630.pdfIn PDF document text
    • http://kusuvera.diycottage4u.com/uploads/1/3/1/8/131858530/lulavawowidoviju.pdfIn PDF document text
    • http://vutuba.royalmarineser.com/uploads/1/3/1/8/131871787/zamazarasa.pdfIn PDF document text
    • http://files.alliedanklefoot.com/uploads/1/3/1/3/131379748/2b62b3f4683b.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/1/0433/7595/2030/files/90215142644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5227/6632/files/asthma_treatment_guidelines_aafp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/tofixaleduropopiminelixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/hotel_formule_1_paris_bagnolet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3567/2219/files/5669467702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/bugulazaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/xijagezelefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/cajun_injector_smoker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/33130033832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/disk_write_error_steam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/9475/4726/files/video_ugly_alert_sub_indo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8624/1189/files/ziwawuderureles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/60017400155.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_off000179d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179D7 5384 bytes
SHA-256: d9c9f54f915411f4bf324bda9e0e252122fb2b712472c69a95939fd7eeaa6d40
font_01_sfnt_off00018b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B9B 19208 bytes
SHA-256: 151fd87055e9ca343c909b991922532f40dca6840a673304b17b2eecf4d1b7ac

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