Malicious PDF — malware analysis report

Static analysis result for SHA-256 9997cd6d2b74af1a…

MALICIOUS

PDF

46.9 KB Created: 2020-08-28 06:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f70262a203b7c80c0bc8dc080b78b1cd SHA-1: 96461d0ea9a95f150549b707fce247f71882e5c6 SHA-256: 9997cd6d2b74af1a63bf5029aa0cc6ce44b63750a5f2e161312f00080f561c35
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com'. This URL is part of a link farm designed to lure users with search engine optimized book titles, such as 'Oxford modern english grammar free d'. The primary malicious link directs to a known malicious redirector, indicating a phishing or malware distribution attempt. 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=oxford+modern+english+grammar+free+d In PDF document text
    • http://files.govpoconos.org/uploads/1/3/1/6/131637224/2781267.pdfIn PDF document text
    • http://files.nourishyourpurposenow.com/uploads/1/3/0/8/130874254/5086420.pdfIn PDF document text
    • http://files.johannavuorela.com/uploads/1/3/2/7/132712174/287165.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/1/0433/7913/0531/files/vajuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/salesman_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/mifajerutuwipuzade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/campanilla_criminal_law_reviewer_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/98183528700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/flower_pots_coloring_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/xuzirusukebopub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/27375982959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/bewokavufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/ftc_buyers_guide.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 2

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_off00007962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 5416 bytes
SHA-256: a1ab3c10c5f880e3448c0e4526174a64a608d8e214cf76b063ed8f6f8729b008
font_01_sfnt_off00008ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA8 10268 bytes
SHA-256: 44b8164499293fa1ef49028b29eddda818a12b07bc6a83ba331902a4b3e5e238

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