Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56b1ea6040b0350…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 07:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e6a36a3cd3b1bab5fde831bb74851b5 SHA-1: cd740053ea4ce9bcc53091f9f8a910c538fe9bff SHA-256: d56b1ea6040b0350511943660101668d99000bc2879123434f1a77c78d6d4fac
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'adobe acrobat reader dc reduce pdf size' and a URL that appears to be a lure. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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=adobe+acrobat+reader+dc+reduce+pdf+size In PDF document text
    • http://karuso.wessexmaternityacademy.org/uploads/1/3/0/8/130874232/sebuxabibusura_koxiduraragapix_memaxetodukofi_kuripiji.pdfIn PDF document text
    • http://zitikupo.sheltonprivatevoicestudio.com/uploads/1/3/1/3/131379730/zedule.pdfIn PDF document text
    • http://files.justinmantooth.com/uploads/1/3/0/8/130814462/22b8a5.pdfIn PDF document text
    • http://files.krmenterprise.com/uploads/1/3/1/4/131482886/5014760.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/1/0432/1994/3579/files/pufex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/51146418904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/nixoradezovuvejusojibubaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/30752741448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/55497601639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/22912665195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/55701137442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/rokamegevidumosix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/37599128888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/53548328726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/3440260130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/37098000030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/pujifusatixakewegigobib.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 2

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_off00007bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB3 5296 bytes
SHA-256: 2a227e7e246ae2288062e806c05bd47df5996f6d642221790d1247ebfe3c4ea4
font_01_sfnt_off00008dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCC 9888 bytes
SHA-256: 4038c075b7598f25cbde02ec073bb0afb4f25780a2141040ea263e2979625dc7

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