Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fc163fc82ce8d5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 18:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d9222d4fc7c6b1575593363c179e774 SHA-1: dc1c6371b3e81812d897f20bf629053b7449d896 SHA-256: 69fc163fc82ce8d56f91f8f8d2cc1afffa6a37d96850e5ee0946fbde546dfdf7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. This infrastructure is used to host a link farm of PDF files, likely to deceive users into downloading further malicious content under the guise of educational materials. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution scheme.

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=doubles+worksheet+grade+2 In PDF document text
    • http://files.realisticwingtutorial.com/uploads/1/3/1/6/131607440/3a5dc4efa5.pdfIn PDF document text
    • http://toforelu.catholicartistconnection.com/uploads/1/3/1/6/131636612/9087441.pdfIn PDF document text
    • http://files.estherica.com/uploads/1/3/2/6/132682819/69e77d1a3a35994.pdfIn PDF document text
    • http://files.judyireneharney.com/uploads/1/3/2/8/132814518/e73b3f.pdfIn PDF document text
    • http://files.mpmasons.org/uploads/1/3/2/3/132302736/b66185354f42c.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/1/0432/5959/2859/files/menazixufeduso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/55451475062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/25614900053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6763/5867/files/blackbird_beatles_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/date_format_iso_8601_z.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9825/8074/files/16294729860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/command_prompt_reference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/holt_mcdougal_algebra_2_common_core_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/78384480874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/vibeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/pharmaceutical_capsules_podczeck.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_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 5512 bytes
SHA-256: 43210be6bebc3effdacc1d02567e596bf2fb7528338bb77356a40eef8dddb45d
font_01_sfnt_off0000773d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 10364 bytes
SHA-256: be6874786dd1e61dda19e7d166cb655d90dced85e057330f293371056b95c3c6

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