Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d8cf6c052c8fe9…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 23:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b281036fe275dd3dce635591dae06b61 SHA-1: ed8064b58fe3008c040e71d3a964716460d6c913 SHA-256: 05d8cf6c052c8fe9a794a597f3edadca0908933da85ef3fcb036611d01a49195
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free download for educational material, which redirects to a known malicious infrastructure. The document body and embedded link structure suggest a phishing or malware distribution lure. The presence of embedded URLs and the ML classifier's high confidence score indicate 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.ru/pify?keyword=cambridge+primary+science+activity+book+4+answers+pdf In PDF document text
    • http://mabakog.cleanrecordillinois.com/uploads/1/3/0/9/130969057/e55d6c54117a.pdfIn PDF document text
    • http://files.messianiclaw.com/uploads/1/3/1/4/131454620/2255095.pdfIn PDF document text
    • http://files.malvernehistory.org/uploads/1/3/0/7/130775490/603dbcbf8.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/1/0438/4640/2213/files/rilalotivezamuwifan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/javascript_download_blob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/64754069162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/60295022938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/71057000104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8606/1473/files/balogh_mary_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/fitufeniziripetiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/bentley_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/52282860895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/93044415897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/oceanic_time_warner_cable_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/mojenefiropod.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4540 5896 bytes
SHA-256: ca3e24082d83bd236d05ca8f6967578efcf906d3a3de4aeb92af5b960ec43e0a
font_01_sfnt_off00005962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5962 9404 bytes
SHA-256: 67b3d3383d3cce6418f4a7f7cfad8fc5faf37a04a628642a3541d55af90ac988
font_02_sfnt_off000079cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CF 16996 bytes
SHA-256: 6ff7b0b7ad6305e56d779a7795f967aa0c8f1e4520e0a7b9f194f956498f2dc6

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