Malicious PDF — malware analysis report

Static analysis result for SHA-256 83eb62fb8cf02854…

MALICIOUS

PDF

49.1 KB Created: 2020-08-03 04:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e39a16d764e9c64f2369c4f7d8b186ad SHA-1: 117aa55065f4f6f0058012fa4bbb847c78e665f2 SHA-256: 83eb62fb8cf02854471b1dd319d91daf3b24978ba58b2b25042eb369778732ef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a primary redirector pointing to a malicious URL disguised as a free download for 'auditing standards pdf for ca final'. The heuristic firings indicate this is a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to external sites, likely for phishing or malware delivery.

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/wb?keyword=auditing%20standards%20pdf%20for%20ca%20final In PDF document text
    • http://files.jcbnc.org/uploads/1/3/1/4/131452836/83c2755.pdfIn PDF document text
    • http://files.arnhemfallenangels.nl/uploads/1/3/0/9/130969710/8779414.pdfIn PDF document text
    • http://files.jonperryartist.com/uploads/1/3/2/6/132680852/lopuzosabuw_lonoxoxa_zibidoxewarikeg_womizezitejukoj.pdfIn PDF document text
    • http://files.allisonsellshomes.com/uploads/1/3/1/4/131437147/toteviri.pdfIn PDF document text
    • http://files.skski.net/uploads/1/3/1/8/131871799/fumijifivi-vosadeguguzubok-pudez-tikekadexipowa.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0433/3050/2806/files/dujugavabilapejuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/diletodifizedalugilag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/xenupitapedinabanakega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/76039852317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/popupunukunuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/ragigutavozakatar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/53656686590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/36694549185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9058/7291/files/ford_e350_repair_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/lavojukipiwevevabimedilok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/markdown_comment_out.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/zedususedodijivomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/alexa_won_t_connect_to_wifi.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a7b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA7B1 3876 bytes
SHA-256: 42b024351c5badbd257f687d9fc6f042f4e10924f4f848b758ec10c5ad55822f
font_00_sfnt_off00006711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 5312 bytes
SHA-256: 1c2dfbd8d8bbdb52d89a34109e44ef06913c348dc0c2e4d317bd7928f9a574e5
font_01_sfnt_off00007931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7931 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00008494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 10248 bytes
SHA-256: a29b3410032fa20f9ca11f7c357259db43f72c6a83235a02e9be65a9b9405a96

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