Malicious PDF — malware analysis report

Static analysis result for SHA-256 1643b886a850a300…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 23:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c987e305601e823668aea96cff010fd4 SHA-1: 132e64bfe695e52c22695840f40e2f6318486438 SHA-256: 1643b886a850a300f69a1113a896c9fbba564c78f66e2160ba3466d19936e959
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure like "https://ttraff.ru/pify?keyword=satellite+communication+objective+type+questions+and+answers". The document body also contains this URL, suggesting a lure to trick users into clicking these links, likely for SEO spam or phishing purposes. The ML classifier strongly flagged this PDF as malicious.

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=satellite+communication+objective+type+questions+and+answers In PDF document text
    • http://files.jmyrsiadeseportfolio.com/uploads/1/3/0/7/130775760/9316652.pdfIn PDF document text
    • http://waxab.kauaifoodofthegods.com/uploads/1/3/1/4/131483281/gamovivalip.pdfIn PDF document text
    • http://files.weddingstationerybyamanda.com/uploads/1/3/0/7/130775137/vopanerumoxisud_megute_jozivulazet_wizev.pdfIn PDF document text
    • http://baligoze.newnarrativesinphilosophy.net/uploads/1/3/1/8/131871864/2774324.pdfIn PDF document text
    • http://laxunu.riceroadchurch.com/uploads/1/3/1/6/131636719/sitaduxaxuti-wisuv-vupifatotav-famujez.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/1/0432/5864/2595/files/bebofinefigovujej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/john_lewis_pet_insurance_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/57809736810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9393/4748/files/antiquities_act_1975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/24433010377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/how_to_download_a_vimeo_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/dekelezegogones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/jevonuvabufizexefur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/4563439631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/36775774034.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 1

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_off00006878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6878 5920 bytes
SHA-256: bd2002258def924944d4215332e571cca75ffaa3a8e2f1834327ecd3c721c24b
font_01_sfnt_off00007c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 10408 bytes
SHA-256: 7389741a1312d4c69516ea20491c2c5e3853883f0b65d6f0ee7cdb4c6dfe4619

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