Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4d5ec208d61581…

MALICIOUS

PDF

50.9 KB Created: 2020-08-21 12:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ddb3a4ee7be259931605ffbecc1c5ef SHA-1: fe829a6c73898e4d6bbfda26101fe6cfe82f5803 SHA-256: 4a4d5ec208d615819ed115236cb769af945703a2e55c908b9403ba0cf75d3a42
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an admission form, aiming to trick users into clicking it. The document body and heuristics indicate a lure for users to visit the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious site.

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=admission+form+for+pune+university+2019 In PDF document text
    • http://sador.cjbmaed.com/uploads/1/3/0/7/130739777/pixamokizek_kogaxakogili_vomadebedi_durudenenejegav.pdfIn PDF document text
    • http://files.tomgauthier.com/uploads/1/3/1/6/131636956/0a671855.pdfIn PDF document text
    • http://kitaj.noramacquarrie.com/uploads/1/3/2/7/132740763/1374125.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/1/0435/5453/7624/files/anemia_falciforme_ministerio_da_saude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/wofavomujitotibuteza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/vorobijavexake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/dujigotamuxebulumijezonuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/good_will_hunting_movie_free_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/restaurant_guide_michelin_paris_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/35040162408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/basic_plc_programming_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/how_to_reset_bluetooth_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/68375931724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/geometrical_tolerances_symbols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/vifefij.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 5

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_off00007f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 5580 bytes
SHA-256: 96dd4f86da941f4e2e982a7cb983e60c34e08ed29941a99918072255c19991bb
font_01_sfnt_off00009264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9264 14240 bytes
SHA-256: 7531521204db12797a0aa0dd6c3ffc9b7c2db76fadb7f2d9a9665403524bebc4

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