Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cef28ce3b71aa85…

MALICIOUS

PDF

37.7 KB Created: 2020-08-25 11:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9487c8c00f0bfe2c4c3b4912859b45f4 SHA-1: 486a33ee10fad0a5c8f74cc218bfd5c606c2fd1c SHA-256: 3cef28ce3b71aa8516ef226e95306cf9252a2338b437eb20048f60dd9e34ca44
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'performance evaluation report form' and includes the malicious URL. The primary attack pattern involves redirecting users to malicious sites via 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.ru/pify?keyword=performance+evaluation+report+form+government+of+punjab In PDF document text
    • http://files.baskog.com/uploads/1/3/1/3/131378953/vewitopemoz-pobopuvegor-fivararojowu-fojudipibewixav.pdfIn PDF document text
    • http://vowoxeva.southdevonslinglibrary.com/uploads/1/3/2/7/132740267/feratasupa-savepaxifikano-rusipuzit-kepazeve.pdfIn PDF document text
    • http://xedase.fromnicolawithlove.com/uploads/1/3/1/4/131406557/dozibem_zakoxo_ribevomirajifem.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/1/0434/0062/6341/files/nezokif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/toludel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/66181132094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/76263050980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/abstract_sample_for_research_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7625/4873/files/lolikesixofesax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/wivavukakovuvosubalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/mekanisme_kerja_benzoil_peroksida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/makalah_dinasti_bani_abbasiyah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/3860137196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/babur_gaan_dj_song.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_off0000540c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 5432 bytes
SHA-256: 12b9a8a563a8c217845d70a1424491bde695c2274591ff959aff1b56323528d1
font_01_sfnt_off00006677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 10392 bytes
SHA-256: 65a4bb0ed5715739efd8dd578b4d266ec2c2e21aef1109196c395ed15f2ff738

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