Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c960e9aceb4a21…

MALICIOUS

PDF

50.4 KB Created: 2020-08-09 03:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7428187c96252d3b73ae7f00156040d SHA-1: 171e21721f6b1fd328a8eeee80a4bcd35739cab7 SHA-256: c5c960e9aceb4a2149701dc8dfe7feca83778c8959a5767d79a1b5da10ed13fd
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=carbetocina+pdf+2020', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent.

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=carbetocina+pdf+2020 In PDF document text
    • http://files.dollarsaver.org/uploads/1/3/0/8/130813612/ea2f4864.pdfIn PDF document text
    • http://files.elizabethhitzel.com/uploads/1/3/1/0/131070581/5ab16.pdfIn PDF document text
    • http://pigilan.dollygiftbaskets.com/uploads/1/3/1/4/131453574/ravilesuzimeman.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/1/0428/0942/6079/files/20561768022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/biostatistics_in_public_health.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2416/0667/files/4390331449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3562/3578/files/gosokoguwosot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/quimica_peter_atkins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/advantages_of_relational_database_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/25415368031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/60033818601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1089/5520/files/athlean_x_biceps_black_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/download_buku_akuntansi_sektor_publik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/sosakosusazexubofotad.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_off0000788c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 5260 bytes
SHA-256: 093c633425cf33f1fab509faba1260e9592bb72528c019210d0f108976d834a3
font_01_sfnt_off00008a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 15500 bytes
SHA-256: 02466290d0f8c50e6af5ee2d4be9ad7075b49ee43f90ce9a2bd99ebef24a3cdf

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