Malicious PDF — malware analysis report

Static analysis result for SHA-256 2563f88956745c40…

MALICIOUS

PDF

42.9 KB Created: 2020-07-27 22:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e81518ab1f5e9f514a3d02091e9c55c SHA-1: c2963dcdae789c166350f7e343c4d0d1715927b2 SHA-256: 2563f88956745c40db93043cce2d20b7bc52572381116d58e80d906a98292112
202 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is part of a link farm designed to host numerous PDFs. The document body, though heavily obfuscated, suggests a lure related to a 'hearthstone deck tracker arena helper', likely a pretext to encourage clicks. The presence of a visual download button further supports a malicious workflow aimed at tricking the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hearthstone+deck+tracker+arena+helper In PDF document text
    • http://files.triciavanoostveen.com/uploads/1/3/2/7/132740987/1454771.pdfIn PDF document text
    • http://files.bsjmun.org/uploads/1/3/1/6/131606094/d927fc0d5.pdfIn PDF document text
    • http://files.reddsocialstudies.com/uploads/1/3/1/4/131407047/5a538e0889e434.pdfIn PDF document text
    • http://files.campcreekbaptistchurchguntownms.com/uploads/1/3/1/6/131606782/gukujajorab-fuwivu-nadigopoke-vasavalamule.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/1/0428/8544/7833/files/48450578518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/xojepilevimumisusazosizor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/fevagisiwovurifukuroje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/88513049599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/72985997048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/jonizutozilinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/80433190666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/83380154413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/78357693523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/49697055904.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_off00006944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6944 4928 bytes
SHA-256: 813322fac0953ed4b426f1ab8c619c90aea48a3bf797255e7a93e291ec505747
font_01_sfnt_off000079ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79ED 11204 bytes
SHA-256: 4a4fa11cf6f519e3456de200dc9359c5fc90db350d4d2bfbfe1b38280709c003

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