Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57d556549a368e4…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 13:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c172b3672a100c291c807c9f11283c5 SHA-1: ee26e164e62451bcf0f5277649474d022fa4d77b SHA-256: e57d556549a368e4e9e476d41d1356e131a814be8c8493e71b8b80abb520da9c
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, many hosted on Shopify, suggesting an attempt to game search engines or distribute content. The primary malicious URL identified is ttraff.com, which is likely used for redirection to 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=brevet+anglais+2019+pdf In PDF document text
    • http://files.michaelnewmannovelist.com/uploads/1/3/0/9/130969768/gikejarenoxesowil.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/1/0433/9181/1734/files/physics_book_for_bsc_part_1_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/22752173361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/xopesajawilub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/zosisesikeniwipilexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7524/7003/files/apprendre_chinois_debutant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/bexozugek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/dudadozire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/dizamogenejesa.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC0 5800 bytes
SHA-256: ebd30f3400b79ced74476e1b10858718aad0e68cc206db8a3829466c93e91932
font_01_sfnt_off00006194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 1956 bytes
SHA-256: 56a53b80793a57ae0a2ff185a047ca1e37b57a0e8d64e13b04e3c35c58b8895d
font_02_sfnt_off00006ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 11820 bytes
SHA-256: 2e9547b906ae0854ea142838746735c3414ac21513232aae7f36c96b1866fdd8

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