Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec0fe6d58b2da6b…

MALICIOUS

PDF

43.5 KB Created: 2020-08-03 23:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: abe0048895274162239cb9750b15c66d SHA-1: f414458993b9c0e8c1c5ab247bc3ba67bd71db65 SHA-256: 8ec0fe6d58b2da6b36b7bfa5ad13873a862a4f18e8ae94e28f191b4ef1627e59
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a 'weekly study schedule pdf' lure, and the embedded URLs are consistent with a link farm or phishing attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent, likely to redirect users to a site for further exploitation or credential harvesting.

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=weekly+study+schedule+pdf In PDF document text
    • http://files.jmaisd.net/uploads/1/3/1/4/131438137/f41ea4.pdfIn PDF document text
    • http://files.mathtalks.net/uploads/1/3/1/4/131453252/2456137.pdfIn PDF document text
    • http://files.louthbeekeeping.com/uploads/1/3/1/3/131398195/kadadoponi.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/1/0433/0805/6740/files/72692988866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/motaragipoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/xarobizefipiwunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/red_chins_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/99635222851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/maxomasazaxavufilotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/pat_test_pbsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/bisum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/67511875755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/zekanatibikorezan.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_off00006d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8A 5116 bytes
SHA-256: f44f97eceeb8957176c4bafe162d4a3e1891c63d4e510be48dbcd0cdb11cf17f
font_01_sfnt_off00007f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 9980 bytes
SHA-256: 370a63458a651ebaa8ec61f9e42812ef67208b48545b42bb82a30ea2922dd78c

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