Malicious PDF — malware analysis report

Static analysis result for SHA-256 851ac5f6558609c1…

MALICIOUS

PDF

49.0 KB Created: 2020-08-25 04:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b44844c2e08378b97c5e993fb7cb84cc SHA-1: eb6848a2141e17448726dcb461bdbec0e797f865 SHA-256: 851ac5f6558609c14cbdd3f7b1d42589b276ffaae33f089e61c5d5a80b6d16b8
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The primary redirector URL is https://ttraff.com/pify?keyword=apache+thrift+vs+grpc+performance. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful sites, likely as part of a phishing or scam campaign.

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=apache+thrift+vs+grpc+performance In PDF document text
    • http://files.immaculate-concepts.com/uploads/1/3/2/6/132681891/16ea09.pdfIn PDF document text
    • http://files.turtlebee.co.uk/uploads/1/3/1/1/131163718/450801.pdfIn PDF document text
    • http://files.themiddleshelf.org/uploads/1/3/1/3/131381614/019cbf5a3.pdfIn PDF document text
    • http://files.teninabedtheatre.com/uploads/1/3/0/8/130813799/tinidu.pdfIn PDF document text
    • http://files.tangonegrofilm.com/uploads/1/3/0/7/130738875/rolubotax-ratatedur-jebiberolusov.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/1/0431/9762/8576/files/narasimha_naidu_cinema_songs_naa_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/cuestionario_de_afrontamiento_del_estrs_cae.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3231/9899/files/doraemon_story_of_seasons_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/15127636000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/43664123473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/fukafoxizixosoxav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/wixiduwulumefinet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4303/2983/files/generalized_epilepsy_with_febrile_seizures_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1159/files/jizozuligowulolesidebewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/rosimoxezite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9983/0939/files/jspdf_autotable_codepen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9876/5480/files/pdf_to_word_converter_program_free.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_off0000820d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820D 5448 bytes
SHA-256: 0c05fe620a2b561937c385b70e0620d95561c800f2801c0b6e7c83bf75efa75a
font_01_sfnt_off0000947d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x947D 10120 bytes
SHA-256: 5a060f58fe56fcde17563e941a9cd671f781413fd3db06fbacafe2e5f364e750

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