Malicious PDF — malware analysis report

Static analysis result for SHA-256 953b69955827e35f…

MALICIOUS

PDF

45.8 KB Created: 2020-08-21 03:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 32799caee42f574e3bd3415bd9340d52 SHA-1: bc422988af5fc92091fbeab3f312fdf4c72b1faa SHA-256: 953b69955827e35f83021d815761205f90678da3bbd7a2f7fa08d5954482ea08
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.ru/pify?keyword=meiosis+worksheet%2523+1%252F+le-+biology+answer+key, is identified as a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=meiosis+worksheet%2523+1%252F+le-+biology+answer+key In PDF document text
    • http://batufupat.dawnrabey.com/uploads/1/3/1/4/131453213/6249418.pdfIn PDF document text
    • http://lawukov.ridgleawellness.com/uploads/1/3/2/6/132683014/nojoxuxikifu.pdfIn PDF document text
    • http://lunulutal.amandanelsonart.com/uploads/1/3/1/6/131636612/7977799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/11th_std_botany_practical_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/90264152459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/cladistics_lab_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/jivavune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/pamirigisizewexetitosow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/data_studio_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/bozafekokejepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/skywars_minecraft_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/administrative_office_management_an_introduction_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/95647759193.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 4376 bytes
SHA-256: 9f8d3e96c340398ecec2cec0ce463f61f252b6bf5ffbc55008d18e9c300aad7b
font_01_sfnt_off000079e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 10192 bytes
SHA-256: 131311bf3655c171fcf188d6b70ec92186c50411abaa04a4839fc72694675a7b
font_02_sfnt_off00009cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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