Malicious PDF — malware analysis report

Static analysis result for SHA-256 9833f9afb0a3a3db…

MALICIOUS

PDF

62.2 KB Created: 2020-08-10 09:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4df65f07814c0c94bd1a99ba07f62252 SHA-1: 6e61c37ac8a7e6c89671b083e485d648541bd9ca SHA-256: 9833f9afb0a3a3db8e8cdf581db378781efc8e7aed4e679e301130975cb25bb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that the heuristic flagged, suggesting the primary intent is to drive traffic to this malicious redirector.

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=manualidades+con+material+de+reciclaje+pdf In PDF document text
    • http://files.oxfordbakingcompany.com/uploads/1/3/0/9/130969798/damodozuzilan.pdfIn PDF document text
    • http://lizeviti.pmubywendyrose.com/uploads/1/3/0/7/130738841/vapanalomo_migujaf_siresamug.pdfIn PDF document text
    • http://files.markwatsonwilliams.com/uploads/1/3/0/7/130776460/disig_gobixitebedi.pdfIn PDF document text
    • http://files.demusproductions.org/uploads/1/3/1/6/131637679/6666b6e7c9b6a6.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/1/0429/2755/4723/files/the_economist_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/99363592285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/orson_welles_macbeth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/33317111016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7640/files/tenivanuropovozali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/descriptive_statistics_interpretation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/juwepemosifujaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/bevagekasozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/25839057699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/kadileditozimit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/luxuxanibiruziguxovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/perl_one_liner.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_off0000b33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33D 5384 bytes
SHA-256: ee306b3dbee7a794562b91f11175395d2ed7b6f37d11f15a6c840c8376dbaf22
font_01_sfnt_off0000c587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 11124 bytes
SHA-256: d3675d3ad2d38d7f1145b70bef8379b081e03bab37e70d0276ca8b1523f7bd07

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