Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba3e86ebab2ede1…

MALICIOUS

PDF

44.5 KB Created: 2020-07-18 20:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa4050f9d0d801429c03561514c9d93f SHA-1: ec2d6e1f7298d53ab877f0d4cf3e2e9399f604d0 SHA-256: 7ba3e86ebab2ede16daaf631739837f654f2d16b494042bf3af0e1793f500c2f
194 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF containing a large number of embedded links pointing to redirectors and potentially malicious content. The heuristic firings indicate it's designed as a link farm, likely to distribute malware or conduct phishing attacks. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure.

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/wb?keyword=lajos%20zilahi%20pdf In PDF document text
    • http://files.blackbeerchick.com/uploads/1/3/1/0/131070520/joleje-lunoboxovip.pdfIn PDF document text
    • http://files.ratzlaffcabinets.com/uploads/1/3/1/4/131437649/vatemu.pdfIn PDF document text
    • http://files.brisbaneartclasses.com/uploads/1/3/0/8/130874210/dd9d11863f2e.pdfIn PDF document text
    • http://files.operalegacy.com/uploads/1/3/0/7/130775888/jadosas.pdfIn PDF document text
    • http://files.suppesehconsulting.com/uploads/1/3/0/9/130969624/2f229f6.pdfIn PDF document text
    • http://files.horsesinfocus.com/uploads/1/3/1/8/131856917/todaxabav_xetiwugifobib_gaxenogisumat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sovegobenak.files.wordpress.com/2020/07/50196426505.pdfIn PDF document text
    • https://vogajakojoge.files.wordpress.com/2020/06/bibowofafilazewuba.pdfIn PDF document text
    • https://lusavorin.files.wordpress.com/2020/06/pawedagatakimufozaxunus.pdfIn PDF document text
    • https://xisomivupeba.files.wordpress.com/2020/07/wafudinosewonez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/mivurovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/30610292786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/kobigaguxabiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/75758165917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/31620308938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/62336679648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/kafazapunobujobono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/7792004703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/susaladoromonezufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/59933849412.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7141 4584 bytes
SHA-256: c26bffac3978e5143f306c8a61d5babd4bd1504c627bd55fec41bc0bfcac89ff
font_01_sfnt_off000080df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 10476 bytes
SHA-256: 99d5c9fa8bff7fd24c9a211f9a3a1ffe5eed46ad277000f0647bb488bb39cc91