Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2939b902e923895…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 06:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 718981d937ca7df415e4a6617a0a89e1 SHA-1: 12b79f39d5219c458289461194a84eddda5f5ed8 SHA-256: a2939b902e9238957bef207a4542953baed12482229ac57800e4a12a2aa13d59
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a PDF related to a 'nursing assessment process' and includes the malicious URL. This indicates a phishing 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.ru/pify?keyword=nursing+assessment+process+pdf In PDF document text
    • http://files.plazacateringboston.com/uploads/1/3/1/0/131071063/7de5b4ea6bc672.pdfIn PDF document text
    • http://files.lindsaywhitemusic.com/uploads/1/3/1/0/131070374/4031000.pdfIn PDF document text
    • http://files.tell-consulting.com/uploads/1/3/0/8/130813118/tuvinoxigifufivora.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/1/0433/5458/7288/files/xedoluparituwusopozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/sedizurejodegilosejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/68051301444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/sidopebamewajazadatariwot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/jemegugega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/petipabaxasifugavixal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/72959785760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1115/1768/files/xidori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6472/7454/files/puwagodaburodotejediv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/somupaloxusuxuvunibiguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/12431435143.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_off00006d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1B 5412 bytes
SHA-256: 6537ac753ccf3fa84708c17341e16ec2607f18d50e267f9dfc7e7e4b221f804e
font_01_sfnt_off00007f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F79 10020 bytes
SHA-256: 54ab188c6adb2ea49c1588b8712d295e514f49074223ba9ececde3700df74964

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