Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a999995c68c7f5…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 06:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 206efc48fabb3409a93310dc791c8785 SHA-1: 66d463b59f9c3815ad9aa40e6351e50af76e865b SHA-256: 52a999995c68c7f50856083e880d8b1d29738a0841e170c46a67cc7c24999db7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious link disguised as interview questions, which redirects to a known malicious domain. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic.

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/pify?keyword=credit+risk+analyst+interview+questions+pdf In PDF document text
    • http://gazapakux.thrivinginclusion.com/uploads/1/3/0/7/130740596/fe77c9dc9ad.pdfIn PDF document text
    • http://jotok.magicalcelebrationtravel.com/uploads/1/3/1/0/131070387/mebid.pdfIn PDF document text
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdfIn PDF document text
    • http://files.jenlarussa.com/uploads/1/3/0/7/130740264/8428588.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/1/0435/3638/4159/files/zuronulunolulilagulepas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/serial_ccleaner_professional_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/lisan_ul_quran_guide_in_malayalam_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/deletowozubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/forensic_anthropology_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1220/6241/files/busodigotosoriribomare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/fefefumivufelitanagopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/muximuxidepavakiloneraj.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_off00006441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6441 5384 bytes
SHA-256: 4ca2326e458f3909b47dffc18044e4755366f3dee089c27d3cdeeeccc7fadefd
font_01_sfnt_off000076c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C1 9960 bytes
SHA-256: 826ea4a252737ac2e4c98d46a2c7c890a5f7ef3d3b4cff430d04bd2279204710

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