Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ecf1dc4c8f260c…

MALICIOUS

PDF

34.9 KB Created: 2020-08-20 10:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57e6f1068ac4e08ab284acdcae5df474 SHA-1: d1c68bb50d6252e42ce3a33f8b88b4aab21fd5b4 SHA-256: f7ecf1dc4c8f260c4484a678a0b46bc03675092e39b2aad0c2f5f536b6123326
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious link points to a redirector on 'ttraff.ru'. While the document body is heavily obfuscated, the presence of numerous external links, including one to a known malicious redirector, strongly suggests a malicious intent, likely related to SEO manipulation or redirecting users to harmful sites. No scripts were extracted from this sample.

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=lip+sync+reference+sheet In PDF document text
    • http://rugegumev.andreabridgephotography.com/uploads/1/3/1/4/131453329/gavimaxezutugeb_ritow_dixabasuvije_fefakizago.pdfIn PDF document text
    • http://files.redhawktheaterbc.com/uploads/1/3/0/7/130775623/9429444.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/1/0431/8868/2916/files/xelimafipepip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5719/2865/files/4k_video_downloader_not_parsing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/epic_war_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/gefivujigivilixiwalagoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/nefarubuputonom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/cours_grammaire_espagnol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/ap_biology_chapter_41_reading_guide_answers.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_off00004af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF1 4904 bytes
SHA-256: 282abc838305c07b9089bd62af4f005cc14aec453c0733ede0b008d4447b6c9e
font_01_sfnt_off00005b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 10436 bytes
SHA-256: d2284a0d37f8914135ee9c23a84434e2ed860f21e6e335c4b2ee98e4f6403fce

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