Malicious PDF — malware analysis report

Static analysis result for SHA-256 857b7c1863cd34ff…

MALICIOUS

PDF

37.3 KB Created: 2020-08-05 10:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76c09f4258a97316fc7d13cd59ab1493 SHA-1: ee11add3adb625e46916dd8905bc95d90f36e569 SHA-256: 857b7c1863cd34ff055a73fe9b892b952faf1d2a52a8132e6e471a5f2795d0b4
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are part of a link farm designed to appear as legitimate PDF downloads. The primary redirector URL, https://ttraff.com/pify?keyword=rational+and+irrational+numbers+pdf+download, is flagged as malicious and likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to this redirector and other Shopify-hosted PDF files, suggesting a social engineering lure.

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=rational+and+irrational+numbers+pdf+download In PDF document text
    • http://files.raquelmeraki.com/uploads/1/3/2/7/132740860/3354846.pdfIn PDF document text
    • http://tebij.fxtitans.com/uploads/1/3/2/7/132712615/3374243.pdfIn PDF document text
    • http://files.holisticaimtherapy.com/uploads/1/3/0/7/130776447/remuji-budenarefovug.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/1/0441/3099/2280/files/bavikojivekunebilereron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/kovesedixopevumunema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/dujobijud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/xigegiwasisutifotitalutem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/calendario_agricola_2020_peru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5528/4373/files/17892572232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/gexabixalewumebep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/.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_off00005278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5278 5428 bytes
SHA-256: a57392ce977cc3c617c3f91b9670ee26230bbcbe0ad9eb3ffbf99d50c1545e08
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 10296 bytes
SHA-256: 3ff9fe0466957d89274663b3a9a780c8742bf3e1e72fffcd72de20e23a0f9b7e

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