Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfbaa91fd294114…

MALICIOUS

PDF

35.4 KB Created: 2020-08-17 09:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15aeb9a892810ddafcb58bb8e7ebddd2 SHA-1: 2135eb403c72bd5eaf4b1190698cb269b04b500f SHA-256: bdfbaa91fd294114330305357d2fdd2eb801398f6dc64daf2fc7feeebff5fc7c
194 Risk Score

Malware Insights

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

The PDF contains multiple links, with a critical heuristic identifying a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to attract users searching for specific documents. The primary redirector URL is used to obscure the ultimate destination, likely a phishing or malware distribution 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.cc/pify?keyword=analysis+and+design+of+algorithms+arora+pdf In PDF document text
    • http://files.kellywalkottenphotography.com/uploads/1/3/1/4/131454883/zubelexaso.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/1/0433/0808/9509/files/crop_online_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/reservoir_dogs_subtitles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/42285949263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/diduvuxikuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/74608908234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/sugutisaloxolavesag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/fenux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5164/6119/files/another_word_for_dick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/casio_fx_82ms_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/casio_protrek_manual_1471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/wibujezojijugedipoxugiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/vuzameluriguwijodotopono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/nogavurufuxiganumajexuga.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_off00004b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B00 5544 bytes
SHA-256: 82580a53bcaaf5dcc4e2976e0cbd07fe139b06ce7f170451fb16bcc324afedd8
font_01_sfnt_off00005db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 10244 bytes
SHA-256: 6ee327789a482c6974236e129a619fd563cecf6318a9e9e0ef25f0bc494f33b0

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