Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9b8cb698e4fb77…

MALICIOUS

PDF

84.0 KB Created: 2020-07-23 09:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f44c7cfc12043d3b4163a0a4fd3704a SHA-1: d9ab283a228170739fa88ae78b0e79424f853fed SHA-256: aa9b8cb698e4fb77feb7f84cbe17a04c76ec762434cf7f52a8a68f7116a03670
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and a redirector. One of the primary links points to a known malicious redirector. The document body is heavily obfuscated and appears to be largely junk data, suggesting the primary purpose is to host these links.

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.cc/pify?keyword=liberty+bell+information+facts In PDF document text
    • http://files.walkaboutjesus.com/uploads/1/3/1/3/131381720/14f92a.pdfIn PDF document text
    • http://files.texasbestbrushes.com/uploads/1/3/2/7/132740519/mosuvurixaluzojonud.pdfIn PDF document text
    • http://files.ucelitebasketball.com/uploads/1/3/1/6/131636651/xujipifulagomosajow.pdfIn PDF document text
    • http://files.lynneschall.com/uploads/1/3/0/9/130969494/1269362.pdfIn PDF document text
    • http://files.harrydavidltd.ca/uploads/1/3/1/3/131398142/c89b409381f0c6.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/1/0431/6083/0116/files/94994672169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/zozimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2484/1890/files/dopigumulip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/13640449104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/xijejofedajemono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/19224623341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/77462270885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8181/0598/files/4002474809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/kidupoloxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/batoperutibapefimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/zoxojog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/nikivip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/tudifikomoluvanil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/68614915187.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 6

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_off00010c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3F 4996 bytes
SHA-256: c3f45a5f0a20abdeae43a8ca7c07c5665a78a517c02b846b0c1ed679d8e01cdc
font_01_sfnt_off00011d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1C 10888 bytes
SHA-256: 25bfaf98b28574822c81d489cb73c2e4ad99e996202be34e07d1cf326c173cde

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