Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4af706892e96c6…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 14:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d2ef6cb5906940f45f8c55885e389ce SHA-1: 285cfb911cc8dba2c3274dd9a107e71f7e589c9c SHA-256: fc4af706892e96c6b69e47138b612109c8063871b762f96dbc914582e1175c75
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for link farms and SEO abuse. One of these links, 'https://ttraff.ru/pify?keyword=structure+of+the+earth+worksheet', is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Structure of the earth worksheet', suggesting a lure to disguise the malicious intent. No scripts were extracted, and the primary malicious activity observed is the redirection to a known malicious URL.

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=structure+of+the+earth+worksheet In PDF document text
    • http://files.karensartgallery.com/uploads/1/3/1/4/131437194/ralijo.pdfIn PDF document text
    • http://remiziwox.wwecc.com.au/uploads/1/3/0/7/130775320/8030199.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/1/0437/7450/9213/files/curvilinear_coordinate_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/carpentry_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/xuxeluruvifixano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/daxolitoroxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/12361324976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/98361387656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/ministry_of_agriculture_annual_report_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/72196156240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5061/0336/files/waxezoxabezawikikekod.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 6

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_off00005a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A56 5196 bytes
SHA-256: 1cd44916c457d27c94b6bc6e961143eded6cef61d6ee310d40614253746a6602
font_01_sfnt_off00006c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 10132 bytes
SHA-256: 4c9273aaa3700cf3bd866ae5d410a4a91e39e39fc254c0ad20f33cf62a079375

Open this report in the interactive analyzer, or submit your own file for analysis.