Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab47c0e1cc51b761…

MALICIOUS

PDF

43.5 KB Created: 2020-08-11 07:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e46fc176cebe6b45d4ee7e8f7641ccc2 SHA-1: 6c052643308f09981a8310b23968f603044f39f8 SHA-256: ab47c0e1cc51b7610441049d7c4478c65f4e85896f9dc7efdf1dc952c796344d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting a tactic to manipulate search results or distribute content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection URL.

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=vacuna+antineumoc%25C3%25B3cica+23+valente+pdf In PDF document text
    • http://files.rgsda.org/uploads/1/3/1/4/131438567/fegeru-ravixetifatojur-wopagugusiban-jupil.pdfIn PDF document text
    • http://files.mrsfinney.com/uploads/1/3/1/3/131380767/3525403.pdfIn PDF document text
    • http://remosoz.littlebitfishy.com/uploads/1/3/0/7/130739561/nokuwodarinab.pdfIn PDF document text
    • http://files.theruemorguetattoogallery.com/uploads/1/3/1/4/131454355/21400d54b288ce6.pdfIn PDF document text
    • http://files.aodex.net/uploads/1/3/1/4/131410158/xotawud.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/1/0431/4506/8699/files/9333198553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6100/8791/files/3590755930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/beethoven_symphony_5_score.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/gijaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/20224159519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/jotupipiwasajubufemorebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/86113098499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/app_annotate_ipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/luvudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/kuxezonuzosutimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/fajoxodegeduxunaxijaseb.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_off0000674e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674E 5484 bytes
SHA-256: 2675908da9b45c2a29b58efaac1b072b49bdff0b3fb50709f43f08078d418f77
font_01_sfnt_off000079bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 11464 bytes
SHA-256: 51f8465cf2bc5fef912159ce77bb1d916df6880d4c09bd4e9723e49881978e02

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