Malicious PDF — malware analysis report

Static analysis result for SHA-256 458f94424f0cacbf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 02:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e2d14aab023c843f2d8fe3075cc9d53 SHA-1: 3ba85c57efd41ee0d24491c22275520e33b0af42 SHA-256: 458f94424f0cacbfb867c2bfa0022ae397dd0658a0d81e97eae4a0cfe99eae27
194 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to malicious infrastructure, specifically a URL associated with SEO spam and phishing lures. The document body text, though partially corrupted, includes the phrase "Gate 2018 question paper ece" and the malicious URL, suggesting a pretext for users to click and download potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this assessment.

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=gate+2018+question+paper+ece In PDF document text
    • http://files.writeproject.org/uploads/1/3/2/3/132303035/a4717b487c2.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/1/0434/3191/9765/files/jofivefawotowejopigemiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/babuzusegaboveparet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6714/5366/files/53302970345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1948/2774/files/xarujosigumidavupos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/naxubakukogodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/29266678370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6557/1493/files/77514712856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/28020845362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/92849979310.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5983 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00006a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 5572 bytes
SHA-256: 5674779d788f07550d53de97d21b8572cb8e15a438343dbb6be212bb8ff905fa
font_02_sfnt_off00007d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 10324 bytes
SHA-256: 4ba54cea67aba4a1d27738c2ce7cc644cd04da2ebf0aa6c2ccec12383693539c

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