Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a529ec3f423900…

MALICIOUS

PDF

42.0 KB Created: 2020-08-05 13:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da193f60db6e60a161dbb55f73c7895b SHA-1: 997400f969c59cc853bc20f084a254ee94dbd61a SHA-256: 63a529ec3f42390039ec419b2c123f8632a72c3607a56b40a2ce9340b9b16a7f
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector URL associated with malicious activity. The document body and embedded link objects suggest a lure related to PDF manipulation, likely a phishing attempt or a gateway to further malicious content. The ML classifier strongly indicates maliciousness.

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=diviser+pdf+a3+en+2+a4 In PDF document text
    • http://files.idahonordic.com/uploads/1/3/0/9/130969553/8b0c47c22328.pdfIn PDF document text
    • http://files.stonehengetn.org/uploads/1/3/2/7/132740659/vatukizutij-givima-zunubi.pdfIn PDF document text
    • http://files.gettruckedoz.com.au/uploads/1/3/0/7/130740090/951c62.pdfIn PDF document text
    • http://files.sawelsh.com/uploads/1/3/1/4/131454151/09b9b05.pdfIn PDF document text
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.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/1/0433/0897/4235/files/97524254249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9011/5736/files/91450391649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/nejowege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/dazapejodufagolis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/tuwudepojubad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3885/7623/files/engineering_statistics_montgomery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/zofozuzofevegujonop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xatevidewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/32037064862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/64783423638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/96520011843.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 8

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_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 5448 bytes
SHA-256: 6e14ce5d8cd311adb9b4a49ed7b1f22e8cf638294cec03bf0447c9df934c04a9
font_01_sfnt_off00007628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7628 11392 bytes
SHA-256: a3f685062a8a74ee20bf410652d72464d5c5d7a83adf5eb9eda3a8f44615afb8

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