Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c83beb6342a480…

MALICIOUS

PDF

41.1 KB Created: 2020-08-27 21:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a83dbbe1e44ab498cd2324a7e72ba85 SHA-1: a5b0c976f33f161df115fb6fe26589b5ceaf7758 SHA-256: 11c83beb6342a48093eb508362c800498d806287ea22351244930b87d1b740a0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for phishing or to download further malware.

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.com/pify?keyword=poser+multiplication+%25C3%25A0+virgule In PDF document text
    • http://files.whyportugalnow.com/uploads/1/3/2/6/132696598/vozuje-nuwenibuxuweb-zipokuzugenopel-xonidudikos.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/1/0436/3137/8592/files/tinizodefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/70647162487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6543/0431/files/advanced_excel_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1399/5672/files/xaforonokatobidosaram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/kisaviwarunukuvejetoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/runescape_bounty_hunter_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/kipojazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/13864639344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0965/4174/files/roruvarudeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/98103763098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/24158481609.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_off00005f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 5548 bytes
SHA-256: a9975fd71b278634ac3b1fdf3b7091e63e09b68204c1c6ebd61c466c7aff09e7
font_01_sfnt_off00007149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 11484 bytes
SHA-256: 959a8391ff3d7c5204bd0d18fcb174cf2c23f30321a48600ab71d911c1bfe49e

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