Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a52ff257e8e0b51…

MALICIOUS

PDF

48.0 KB Created: 2020-08-09 13:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 541dabc1d7c22258d9b41fc900045378 SHA-1: cb9ec13a8e8a5769f012d7556f2019a4d01a343d SHA-256: 0a52ff257e8e0b51aeabaa4df41737ec974229619e2650577bcb22b014cb7b51
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a likely attempt to drive traffic to malicious sites. The document body, though obfuscated, contains text suggesting a report, which is used as a lure. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector and link farm.

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=project+report+on+biomedical+waste+management+in+hospital+pdf In PDF document text
    • http://files.avlcbdrx.com/uploads/1/3/0/7/130775998/b07d30e4d7266e.pdfIn PDF document text
    • http://files.braemarmensclub.com/uploads/1/3/1/8/131872286/pekeputafobo_gifuna_tulime_fukudafapul.pdfIn PDF document text
    • http://files.healplaylove.org/uploads/1/3/1/4/131452846/tufuxu.pdfIn PDF document text
    • http://files.taxjustice.uk/uploads/1/3/1/3/131384468/jesakibanid.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/1/0429/9508/9559/files/java_swap_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/makow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/84383944451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/19173979993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/todokotetokanabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/tamil_to_english_learning_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/guidelines_for_management_of_acute_appendicitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8083/1396/files/moxunoxef.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 5

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_off00007c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 5880 bytes
SHA-256: 73ccd6f4fabeae32e0c849bc794c414a0ca5f42923cf1f8132bdda7db363fd47
font_01_sfnt_off00008fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE8 10252 bytes
SHA-256: 2e154e6e5a731b411ef9f383e6544b63ccf23ef550030a2c15cb43404158b661

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