Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb3325d98a4fc0b…

MALICIOUS

PDF

63.5 KB Created: 2020-08-12 20:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 2094f631327e17f24e68a6c885d77621 SHA-1: 9d3a4d048c856fe203a882b1eb7c199db83a6133 SHA-256: 8fb3325d98a4fc0b214cf1cda13e44db9031a6215ed4dde186cb44e293de2891
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=naive+bayes+machine+learning+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=naive+bayes+machine+learning+pdf In PDF document text
    • http://files.slpwaboard.org/uploads/1/3/1/3/131380445/85394a0d45a2.pdfIn PDF document text
    • http://toxima.ahlivintage.com/uploads/1/3/1/4/131409090/9677578.pdfIn PDF document text
    • http://zasova.jemoweryandsoninc.com/uploads/1/3/0/8/130813612/galikoko.pdfIn PDF document text
    • http://files.libbiessimplejoys.com/uploads/1/3/0/8/130873987/susufariripiv.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/1/0438/0285/3538/files/psychological_theories_of_religion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/dexadiwor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/anxiety_test_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vizinedidobirefeguj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9571/0113/files/62617363261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8913/9614/files/93994948409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/jozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/ferigajami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4342/2359/files/44559457950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/77109207563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/kenmore_sewing_machine_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/11932551494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/case_study_interview_questions.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_off0000ae55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE55 5840 bytes
SHA-256: d245bbe8f7cb71d26d50e8cec6273a4a490892a21ba340af3027217d95ed3f06
font_01_sfnt_off0000c20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20F 14912 bytes
SHA-256: 0963226abfe0f58c4d042accedac304bed866843f6a4da41d11d51c5ed000bdf

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