Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d65b3d88ee34540…

MALICIOUS

PDF

41.4 KB Created: 2020-09-10 06:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4decb0792bb7aa1020c7efc9217d323 SHA-1: e1df7239f1557c600f417396801418f60866a322 SHA-256: 0d65b3d88ee3454022f75bd4c16272bdfd7f891687d091a5dd67c1804d3d92f4
194 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a malicious redirector, disguised as a practice test. The heuristic firings indicate the PDF is a redirector and part of an SEO link farm, likely designed to phish for information or deliver further malware. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly suggest malicious intent.

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.club/wix?keyword=parcc+grade+8+mathematics+practice+test+answers In PDF document text
    • http://files.highlight.pl/uploads/1/3/1/8/131857626/zafexugoduzoko.pdfIn PDF document text
    • http://gapem.wmeyer.com/uploads/1/3/0/9/130969140/469964.pdfIn PDF document text
    • http://sukaxipow.andersonolineacademy.com/uploads/1/3/1/8/131856516/f645f20acb40d92.pdfIn PDF document text
    • http://xunugaxi.urjcmunnews.com/uploads/1/3/2/8/132814930/tuxupipu.pdfIn PDF document text
    • http://files.palmoilinvestigations.org/uploads/1/3/1/8/131871657/banutodibu.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/1/0437/9574/2882/files/88414235697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/97334120284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/60538998211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/wodubidamosuwax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8779/7151/files/35023857075.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0b1cf2_2e4534aac4a94591b4b2a02db3cf312c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fdee49_e67216503d9948f097da21f4aeb6dca7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/38eac1_b8a046ea41d64f40846eeccaed048614.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/516574_ecced48352a04b7bb303ce71b1f3b872.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2813e2_ead88b3ba7464dfab01c4f23b4727bde.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 3

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_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5740 bytes
SHA-256: 3ff5cfc30337039449e12222b8b021650a44628872e396b77f76412718603ab3
font_01_sfnt_off00007590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7590 10360 bytes
SHA-256: 4fb34d1251c4a1ed79f83ce16acfd18a871ff6b6ac50922456859c71cd765dd0

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