Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b55ad33297586ad…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 22:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6119dac0713fa38f0915d0ab77f9b1fb SHA-1: 2ca7280c4356b5a75e90c5ca3317f249f23c999c SHA-256: 7b55ad33297586ada9762dc0f3076d02087e8fc678db830daa64c09f0ad79f05
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that is flagged as malicious. The document body itself contains obfuscated text and URLs, including a primary malicious redirector URL. This indicates a likely attempt to lure users to a malicious site under the guise of providing a document or download.

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=reporting+anova+assumptions+apa In PDF document text
    • http://boboxumu.wakefieldstudentsupport.com/uploads/1/3/0/7/130775432/5002136.pdfIn PDF document text
    • http://levutumo.twelfthhousereadings.com/uploads/1/3/1/6/131606758/miditele.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/1/0451/4558/7877/files/phantom_blade_wow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2516/5476/files/kibobupupolosujuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/vepigefoxutemaputaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/calendario_mensual_2020_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5353/0788/files/tuxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/divorce_petition_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/siwubevisafuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/rejibagomeriwezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/33047481060.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 1

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_off00005f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 5172 bytes
SHA-256: 324e56a98bb33a3d203abf22cf4c69d8e3145cda973c38f593d8d1efc733c9b8
font_01_sfnt_off00007116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 10232 bytes
SHA-256: 53ebe88127dec7d340a51f1599322bc3767f2c7a74211ea0fef754c088bb5541

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