Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a42efbbd41adde…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 23:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4b622eee14678e926c980e88177dae6 SHA-1: 9822b56477629ad387bc62d359756a8159c17313 SHA-256: 05a42efbbd41added880c80079a5736f90aab9149f381a53664ed4c8332a6496
194 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, many of which are part of an SEO link farm designed to redirect users to potentially malicious content. The primary redirector URL, https://ttraff.com/wb?keyword=cambridge%20primary%20checkpoint%20past%20papers%20english%20pdf, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into downloading further malicious files under the guise of academic resources.

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/wb?keyword=cambridge%20primary%20checkpoint%20past%20papers%20english%20pdf In PDF document text
    • http://wumusugel.spotlightseniorservicestucson.com/uploads/1/3/0/7/130740019/741584.pdfIn PDF document text
    • http://files.shadysideofthetracks.com/uploads/1/3/1/4/131406762/9744250.pdfIn PDF document text
    • http://xurinupem.bastionhema.com/uploads/1/3/0/9/130969060/pawotob.pdfIn PDF document text
    • http://files.rhenitauchid.com/uploads/1/3/1/6/131607310/8b652613a8f78b.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/1/0436/5543/0302/files/wopakaroxesuvuvanaxiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/19574522488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/vukax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/vopasigawomexumevasanezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/tafanaforukudonow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/architectural_design_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/memimivazosojigoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/aurora_rising_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/xagixafazor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/gajajisejabasusejasodiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/relatrio_de_auditoria_independente.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_off00005a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A85 5780 bytes
SHA-256: 68ae1c79a46d098e7fe8793d61d8b20fd308d5199c66536f2bfb0f4c2d4f4159
font_01_sfnt_off00006e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 14208 bytes
SHA-256: 8af6224ccedebd817d595994d538d8aa7b7dd1295b6935290f869b5ac5165306

Open this report in the interactive analyzer, or submit your own file for analysis.