Malicious PDF — malware analysis report

Static analysis result for SHA-256 b525d15694581abb…

MALICIOUS

PDF

34.2 KB Created: 2020-08-27 18:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f332da07859f4907877ac867461b0ac SHA-1: b9e6a668650bbe4384e719cbd704e870645d2acf SHA-256: b525d15694581abb32490d8b46033d010d85f7b3c921126eeedfd3ce837f968b
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate a PDF link farm and a malicious redirector, suggesting the primary goal is to lure users to malicious sites. The document body contains text related to 'Mortal Kombat X' and a URL, further supporting the lure aspect.

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=mortal+kombat+x+xbox+360+rgh In PDF document text
    • http://files.drcolinadunbar.com/uploads/1/3/1/4/131453605/zulomemasurabexele.pdfIn PDF document text
    • http://files.latitudesinformation.com/uploads/1/3/1/3/131398125/nekikotaro-fofofixebosob-nulax.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/1/0431/1459/4464/files/sosipoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/xofidina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7119/3766/files/bs_datepicker_date_format_angular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/small_business_daily_bookkeeping_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4076/6109/files/piximinewukotibus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/aaron_burr_sir_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/66534546698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/5006105493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4736/2453/files/xokizado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/43116136797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1252/files/zetolutevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/pavemalesojugukumes.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_off00004911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4911 5660 bytes
SHA-256: 7ef0c2b0f1f931ccf98da1f57df2076a661fa1aaf828f5af8df9f54bb119fd22
font_01_sfnt_off00005c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3C 9384 bytes
SHA-256: 051c5e542da5235ea0c8cb89355ac3d54f2660a78fe62144727543c1012e98f9

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