Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a2fa04ea36f271…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 05:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e75f9af3b07351ae1265a5fc524bee61 SHA-1: 8ab16d7951ec49ba9435609a5db4185272a27151 SHA-256: 18a2fa04ea36f27170bc22ae8259364ec4339955586ffed5d32e29e75e1d7292
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, appears to be a lure for "iiser aptitude test 2018 question paper pdf", suggesting a phishing or scam attempt. The presence of numerous links, including a primary redirector, indicates an attempt to lead users to potentially harmful content.

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=iiser+aptitude+test+2018+question+paper+pdf In PDF document text
    • http://files.remedysuppliesllc.com/uploads/1/3/1/4/131453022/8882996.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/1/0437/0956/3034/files/evermore_alyson_noel_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/xejiser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/9102771164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4575/4792/files/jugurur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/23853138717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/72262861920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/air_force_last_year_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/37008120910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/98033439007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/86974848238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/kepopifazavoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/saxot.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_off0000698a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698A 5584 bytes
SHA-256: c98be8487924eef22cd2fe3d9fe651259cf7ac56abea73230ddfdfde60c28a07
font_01_sfnt_off00007c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C99 10660 bytes
SHA-256: c9f6fe80ef5cd4784017e8f1b83a0436997fc417640e414b2898e3b5d011d3d0

Open this report in the interactive analyzer, or submit your own file for analysis.