Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc666aae579a46e…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 17:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d9caa72da1e856144f3b5c2aa50f149 SHA-1: 908fdb52858edc2029cb796a8dd9720c7fd607ce SHA-256: fbc666aae579a46edd880cd0be14fd7940f438f748b8fac99c41289ea931763a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating that at least one URL, https://ttraff.com/pify?keyword=a+tutorial+on+support+vector+machines+for+pattern+recognition+pdf, leads to malicious infrastructure. Another critical heuristic, PDF_SEO_LINK_FARM, indicates the document is part of a scheme to generate a mass of external PDF links, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=a+tutorial+on+support+vector+machines+for+pattern+recognition+pdf In PDF document text
    • http://files.simonbland.com/uploads/1/3/0/7/130776120/7735847.pdfIn PDF document text
    • http://files.upcountryfarms.com/uploads/1/3/2/6/132680949/bfe32cf4fb2c05.pdfIn PDF document text
    • http://files.similandiveguide.com/uploads/1/3/1/8/131871558/b419a.pdfIn PDF document text
    • http://files.cornwallamillionactsofsanctuary.com/uploads/1/3/2/7/132740892/takujemoresebida.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/1/0430/9286/9281/files/70247394310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4673/9878/files/tepusepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/tixogobebujoxizuxukufefuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/88198334532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3448/3605/files/davv_cet_2020_notification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6031/0695/files/esclerosis_multiple_causas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/93264238824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/bipinujujuwom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/tatasogejutupaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/zijumifaxitibipusolulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/heroes_of_might_and_magic_5_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/biogeochemical_processes.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 8

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_off00006bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD7 5620 bytes
SHA-256: 0e5561880d162be1d5f7b032c1abdbe41c440ec9f1e935273dfc88abc25e5cb9
font_01_sfnt_off00007ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED3 9964 bytes
SHA-256: b5f79205ee99f5f0185a903d690e3dbcef8c2f7a83f0e8211f15822d8937239c

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