Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa4e6cb4512ab1f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-11 00:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41ddbc281821b6af328b00f620a87712 SHA-1: a34e795f15ae6da3ba661c1cac196e5093a77b29 SHA-256: 4aa4e6cb4512ab1fe0ff45a064f2716217fc12fd4e2f9475aed88c103999f020
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is https://ttraff.ru/pify?keyword=semantic+barriers+to+effective+communication+pdf, which is likely used to redirect the user to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links hosted on Shopify, suggesting a lure to download seemingly legitimate files that ultimately lead to malicious sites.

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=semantic+barriers+to+effective+communication+pdf In PDF document text
    • http://files.plymouthopsoc.co.uk/uploads/1/3/0/9/130968996/9125441.pdfIn PDF document text
    • http://files.stephencoetzee.co.uk/uploads/1/3/1/3/131398117/31d41bf9e0107.pdfIn PDF document text
    • http://files.gclothingofficial.com/uploads/1/3/0/7/130739814/3d51dd369.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/1/0429/9502/4025/files/wizipewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/50921155891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3735/files/dabekusexasotulumox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0450/1922/files/all_amerikkkan_bada_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/49537916793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/14907967210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/xovutikulab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/john_deere_790_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/luxefatikefunebuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5576/files/26390740100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/immigration_recommendation_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.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_off0000670b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 5572 bytes
SHA-256: e3198e143a4be74a77766fefb105e259535262d1df9cc08ca42154a420ef5ba4
font_01_sfnt_off000079de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79DE 9912 bytes
SHA-256: 4ba34b8c2748440871adf44a232b933974543171b57912e91f4f46818f93efef

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