Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a958fd0d899ad5…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 05:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c791f57d3599ae7ae765473c1e01593 SHA-1: 016ebe4e7dbba319c0208069761014fadd9493da SHA-256: 55a958fd0d899ad568abd6404dafb06c630e8a0b450f7c5445f3af6771895a62
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a PDF download, which is then redirected. 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.ru/pify?keyword=technical+analysis+power+tools+for+active+investors+pdf In PDF document text
    • http://lugox.thefulfillmenthouse.com/uploads/1/3/1/4/131437987/gurizo-kizafexago-vawinebatazi-lixif.pdfIn PDF document text
    • http://roluxaz.northernillinoisfootandankle.com/uploads/1/3/1/4/131437948/rijilapago.pdfIn PDF document text
    • http://mezajubu.jelenadamnjanovic.com/uploads/1/3/0/7/130739204/naserak_lubabepajosori_mexaxokuwek.pdfIn PDF document text
    • http://files.edwingreenbergphd.com/uploads/1/3/0/9/130969809/68c97f556da4b8.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/1/0432/2312/2077/files/zunupotejufuregetajum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3224/8469/files/structural_linguistics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/kejunekujanegigovukaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/kenmore_he_3_washer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/84836015153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/neoadjuvant_chemotherapy_for_breast_cancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/devi_bhagavata_purana_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/gavipipuromelimadikezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/guxufafefipogij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/american_english_file_1_workbook_second_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/50449994997.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 2

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_off00007115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 5448 bytes
SHA-256: 1baeaf02269f5aff28257eb596adbc7d1328cd429405a7299df01c0e1c6b1acb
font_01_sfnt_off000083b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B4 10128 bytes
SHA-256: ec20bfaedb845ffd702a69a9837f151786136862c0f13b37ff059aaf21cfb338

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