Malicious PDF — malware analysis report

Static analysis result for SHA-256 985da9ffad9e41ae…

MALICIOUS

PDF

41.7 KB Created: 2020-08-18 16:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cef1394d5d48e6653cc8fd4e0b66d184 SHA-1: 3505aeed7116759e2f76b881ad8517bf1fabb366 SHA-256: 985da9ffad9e41ae252e65c120370ceee9960a3be4b677b2be4e77d41ce6d8be
194 Risk Score

Malware Insights

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

The PDF contains multiple links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and heuristics suggest an SEO link farm tactic, likely to lure users into clicking on the malicious redirector URL. The ML classifier strongly supports the malicious nature of this PDF.

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=former+buckeyes+in+nfl In PDF document text
    • http://files.antsrus.com/uploads/1/3/1/4/131412362/dexoxov.pdfIn PDF document text
    • http://files.winnipesaukeeplayhouse.org/uploads/1/3/2/6/132695438/379b54de437273f.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/1/0431/7360/9636/files/catia_v5_tutorial_for_beginners_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/fazorij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/kaponomape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/air_france_concorde_crash_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6524/3803/files/3655015761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/keriselep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/8571060881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/tracey_thurman_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/wimomati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/tafavurejuledej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/19609909997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/liridule.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 4

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_off00006497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5076 bytes
SHA-256: 18b943e590b28e90d04f8c1bb5d970b92d6415157a994271cc263203244728b2
font_01_sfnt_off000075db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 10552 bytes
SHA-256: 025ce668c23267b8bbb570e5aaa0d3b0d6cf3d07c79b730425ec2f9be8cea85e

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