Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b894d5ce3afa6b…

MALICIOUS

PDF

43.6 KB Created: 2020-08-08 20:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87edfd0abb48e4705155755fbb1f9f1f SHA-1: a53f047cf165e2bc145a36eaa0e41d8a89c9d156 SHA-256: 16b894d5ce3afa6b7a2295f71e1850d6afa17617dafe1a0724a458f6bcbeed83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, with a critical heuristic identifying a redirector URL (https://ttraff.com/pify?keyword=go+away+big+green+monster+pdf) that is known to lead to malicious infrastructure. The document body, though obfuscated, also contains this redirector URL. The presence of a large number of external PDF links suggests an attempt to create a link farm or distribute further malicious content.

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=go+away+big+green+monster+pdf In PDF document text
    • http://files.doggiedoodlesbydina.com/uploads/1/3/2/8/132815748/padibusobipe_zaxulax.pdfIn PDF document text
    • http://files.dysfunctionalbmx.com/uploads/1/3/0/8/130814066/292ed8bba2b1.pdfIn PDF document text
    • http://rowezojat.namicoloradosprings.org/uploads/1/3/2/3/132302782/videfamuzisujanuko.pdfIn PDF document text
    • http://files.vvsahs.org/uploads/1/3/1/4/131437394/sudikalevabi.pdfIn PDF document text
    • http://kinan.west-pro-installations.com/uploads/1/3/0/8/130873851/7168724.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/1/0436/3006/7865/files/bufonetegod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/wevojipuwevowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/xajap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/adjustment_computations_spatial_data_analysis_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/alternation_of_generation_in_archegoniate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2471/8746/files/sukugonikedoxokutedub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/wabuvuxopanasixurutaboru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/ccrt_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/78314755887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/gavolufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2239/3244/files/28809551532.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_off0000693f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693F 5692 bytes
SHA-256: 76b20ef7bcfb9a246b60e94b10b8421431fcff133d1c5afb674f5f911872c5a8
font_01_sfnt_off00007ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA2 10660 bytes
SHA-256: 1b5625737c49849534e94f790131ee6865a576331e7f411dc148d11b2194cd42

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