Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8cbb5242b3cde37…

MALICIOUS

PDF

33.2 KB Created: 2020-08-12 03:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edbf26aa18652295602cb184bc28886a SHA-1: 65cdd0c161977bcba201f05fae25c4dfec819435 SHA-256: b8cbb5242b3cde3724530ad04d74e0fab3fe2207e194f59ddd1856c574221d10
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicated maliciousness. The document appears to be a lure, using a link farm to direct users to potentially malicious content, disguised as a PDF download. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.cc/pify?keyword=twilight+life+and+death+pdf+download In PDF document text
    • http://rezoze.artistlesliepierce.com/uploads/1/3/1/4/131407440/vefudaxuxanize-vejofofin.pdfIn PDF document text
    • http://files.pennyandcooper.com/uploads/1/3/0/7/130776336/8582937.pdfIn PDF document text
    • http://files.stfrancis-sthedwig.com/uploads/1/3/1/3/131380944/tofovo_divojilodixeral_ralipinavovusuf.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/1/0430/4578/1665/files/79353447420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4012/8671/files/53650236070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/3681084137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/62881737340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7641/4616/files/causality_vs_correlation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/52041195213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7589/5447/files/nufilavipubipabogesosopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/tewagapexugasinojolobare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/koluvufanapesubikoruseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5293/1995/files/93604572832.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 6

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_off000045cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45CD 5072 bytes
SHA-256: 7942ec8de9e09d48c0f4e6fb61b797ad6110e06b9c53d0b9d90faa96bebad602
font_01_sfnt_off0000571a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571A 9668 bytes
SHA-256: 79d39d97c74caa2ffaa13c8f34fe581a5b9a897676c4ca28dce18b13064b7d3c

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