Malicious PDF — malware analysis report

Static analysis result for SHA-256 230d5f12e40718c9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 23:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72ff70728336e4ad1c88cc2a71801570 SHA-1: 1201a80a1dcf523e8dd3931ca941477d631410d8 SHA-256: 230d5f12e40718c95c4c548d0cd53a00ff0e137d1b07c346df7bf3c99a1c43bd
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=advanced+systemcare+for+android+phone', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to system care software, suggesting a lure to entice users to click the malicious links. No scripts were extracted, and the primary malicious activity appears to be the redirection via the link farm.

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=advanced+systemcare+for+android+phone In PDF document text
    • http://files.deltabassclub.com/uploads/1/3/1/4/131438784/mubim.pdfIn PDF document text
    • http://files.leevalley.org/uploads/1/3/0/9/130968996/2942434.pdfIn PDF document text
    • http://lufef.asahi-kasei-k2019.com/uploads/1/3/2/7/132740900/rebomefebajimor-fufed-razute.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/1/0430/6308/3162/files/34811119748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2211/2152/files/english_to_marathi_translation_online_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/javisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/pdf_to_dwg_converter_zamzar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/66190123428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/kalimat_ambigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/nginx_access_control_allow_origin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/zefuboluwunejuzik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/xusanitofezodokotepawed.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 3

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_off000061ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 5512 bytes
SHA-256: ab1b8e6dfa66b75ed37ec7d6038d53be039657dc0262f079621669a03f0047a5
font_01_sfnt_off00007481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 9664 bytes
SHA-256: 4b214adf59f452b7f93de947386fb9a526e4b1ff0f24c89367d95a7093ef2625

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