Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da65aad8ed96b7a…

MALICIOUS

PDF

35.9 KB Created: 2020-08-06 15:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 727b218e4535fb62e32982ffae0ff5a1 SHA-1: 144367770692908f45fbca74df2e706f8d96ab22 SHA-256: 1da65aad8ed96b7a6a0adb8995fb8372ab31b10e08e51bd4e9cb4e995bb90c1f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a search result for educational material, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.cc/pify?keyword=cambridge+english+prepare+level+5+workbook+pdf In PDF document text
    • http://files.theposhlifeoffashion.com/uploads/1/3/0/7/130775466/tepinurivuse-lofatasejoboji.pdfIn PDF document text
    • http://files.jonericschafer.com/uploads/1/3/1/8/131856318/573f5c36b2b770.pdfIn PDF document text
    • http://files.leveringmill.org/uploads/1/3/1/3/131381985/tizone.pdfIn PDF document text
    • http://files.greaterconcordinterfaithcouncil.org/uploads/1/3/1/6/131636766/xiputolivipitumu.pdfIn PDF document text
    • http://files.belltechmachinery.com/uploads/1/3/1/6/131637308/7a8d42ce8e8ccc.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/1/0429/8273/6031/files/cbse_class_12_economics_syllabus_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/biot_savart_law_mit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/luzar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/46712588362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/dawosexurowap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7587/0613/files/rikiwamozudunajan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/53421532071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/devomujatejixawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0395/9720/files/barron_gre_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/86993951071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/tosasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/substance_abuse_counseling_theory_and_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/93548252684.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 7

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_off00004c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C68 5840 bytes
SHA-256: 0abe4a763af5244ae81ce1002340809c23a44c4f902328c7a6c9fb7cf8f8f2e7
font_01_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 10068 bytes
SHA-256: b33c1b7b6aa7214cab0f9246a8e3674b5fc48b89fb693387a19a048327e74220

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