Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4b922f6380e0de…

MALICIOUS

PDF

62.9 KB Created: 2020-08-04 10:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f91625810bdbdf29aac33fffd62c5c93 SHA-1: e5a247254db5359a67cbc39d52027b692f468fde SHA-256: 5b4b922f6380e0dec97b5c26873c0f5c625521736130081c65cad4330aa37bc5
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL points to a known malicious redirector, which is likely used to host phishing content or distribute further malware. The ML classifier also strongly flagged this PDF as malicious.

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=arabic+pdf+characters+are+disjointed In PDF document text
    • http://files.virtualchip.com/uploads/1/3/1/0/131070751/midig.pdfIn PDF document text
    • http://files.fccdks.org/uploads/1/3/1/0/131070718/nibisixabelej.pdfIn PDF document text
    • http://files.impunity.site/uploads/1/3/1/4/131438449/xejupufazaturiv_nuduwaxokuv.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/1/0434/6429/4557/files/dagoxulotop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/hand_lettering_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/biduju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/daxosuxizutijasex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/61215914641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/61218232927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/nosobatujazesinijiwub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/40740938410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2929/0390/files/tofizepixunarepaxonom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/78941378999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/volamaz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cde6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCDE6 19588 bytes
SHA-256: 606668afddf8f67556304f2fa1a6e176f78b5c354b13c0513889eea7b10c1605
font_00_sfnt_off0000861e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861E 5416 bytes
SHA-256: 69643e411378bdf686d59d74ffeb29f3019308fb599fc5ecd8cafddf16194320
font_01_sfnt_off00009885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9885 17092 bytes
SHA-256: d382b9552e38b6b31b4c9b7d6eaceed436248d64586bdd7cc6af2c5d9277d2dc

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