Malicious PDF — malware analysis report

Static analysis result for SHA-256 999ef1e74339d2b8…

MALICIOUS

PDF

50.9 KB Created: 2020-08-10 20:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9350a0fbd320efb5b4338dbfc011cc4e SHA-1: 193bb930ec85a6cefae52478c1e83729ef39d66f SHA-256: 999ef1e74339d2b8059fd2fadff06775753b37971f65df21c614c07693cc83b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to a known malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=basis+of+a+vector+space+pdf' is a critical indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this redirector URL, confirming its role in the attack.

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.cc/pify?keyword=basis+of+a+vector+space+pdf In PDF document text
    • http://mejuz.bepauche.com/uploads/1/3/2/6/132695663/d3818e228a7c.pdfIn PDF document text
    • http://winubiva.ratagordon.com/uploads/1/3/1/8/131872225/dusenoliwuf.pdfIn PDF document text
    • http://files.spartanconsulting.org/uploads/1/3/2/7/132740620/riwanuzagijorefubu.pdfIn PDF document text
    • http://files.amcsouth.ca/uploads/1/3/1/4/131437005/bugutoses.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/1/0432/0883/5234/files/72377577646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/51889401391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/wivexeziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76410179135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/jejudivofamovur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/fluid_mechanics_hibbeler_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/tiwozirexukizupevusudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/maryland_salvage_inspection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/90630556425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/sasotogipotetogitifotuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/regude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/13310898641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/53140805897.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 4

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_off00007f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9D 5228 bytes
SHA-256: 4b61af786413deae4a92daa9ecb80117c0377949889925c737d231eea211b41b
font_01_sfnt_off00009176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9176 14420 bytes
SHA-256: 791a196d76a2bad3465573624acdec9692d68b7392cea1900bfd5d8216715e94

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