Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6a830156c5a6c6…

MALICIOUS

PDF

34.1 KB Created: 2020-07-31 16:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a56b507130442f4cf0f18276279b14b6 SHA-1: 8e48541b1be8176d9ba2da6d94a0f80996d039a6 SHA-256: 0f6a830156c5a6c65e773a45903bd8cd19546993dc35327d22619fe5c1a3fb42
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirectors and a link farm, designed to lure users to malicious content. The primary redirector URL is https://ttraff.ru/pify?keyword=da+5500+fillable+pdf, which is associated with phishing and malicious redirection. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the phishing 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.ru/pify?keyword=da+5500+fillable+pdf In PDF document text
    • http://files.jedburghgs.com/uploads/1/3/2/7/132710630/8601675.pdfIn PDF document text
    • http://files.daankahmann.com/uploads/1/3/1/0/131071043/3352974.pdfIn PDF document text
    • http://files.teachingenrichmentkids.com/uploads/1/3/1/4/131407179/fibowuxexorepataso.pdfIn PDF document text
    • http://files.straystreetstnr.com/uploads/1/3/2/3/132302970/doribukoz.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/1/0432/3262/4797/files/59433020780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/gegifesepoxatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/24922276585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/jarebakiwabegegozox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/32589681261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/31026409740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/33997886950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/devededatisarexosus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/74690740261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/zisirito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/38987543164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/50189842439.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_off000047f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F0 5168 bytes
SHA-256: 810477318f4a7463ca639f6dad87c18ea652ffa90f7abfa2587f0488a41dd7fe
font_01_sfnt_off0000599b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599B 10068 bytes
SHA-256: d3e1064c170d28a49a5996141224937659013fdfe3444dd84a0fe14533f417f9

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