Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebc4c3f89035776…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 01:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf5f7d2352a7a68d3a414fd133c1baff SHA-1: ada3125f1f4c3d07dc17aabfe4ac48ed5834a877 SHA-256: aebc4c3f89035776359d2acceae9b8bd65abfccacf6c920b440c8f088759aef4
234 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a 'free game download' keyword. The presence of numerous links to external PDFs, many of which are benign Shopify links, suggests a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the overall structure points to a phishing or malware distribution attempt.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=counter+strike+game++free+full+version In PDF document text
    • http://files.winkkidsco.com/uploads/1/3/1/3/131384229/8751124.pdfIn PDF document text
    • http://vajim.dacbuildingservices.co.uk/uploads/1/3/1/3/131383483/4200669.pdfIn PDF document text
    • http://nitopeluj.shefaholistic.com/uploads/1/3/1/8/131871721/ef070a1b1.pdfIn PDF document text
    • http://files.landmarkmanaged.com/uploads/1/3/1/6/131606984/6cf60.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/1/0460/0866/4231/files/free_ecommerce_email_marketing_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/begujupagojarujudun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/project_appraisal_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/ropavutadurewavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/93350904883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/42632611476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7834/4097/files/lol_guide_morgana_support.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/cocoa_butter_transfer_sheet_printer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/data_structures_and_algorithms_in_c_wiley.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 4

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_off0000794c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794C 5116 bytes
SHA-256: 26bcdcb7219bbceae149230057620f2797cdc308f9aea92d5b6caba8ac462b12
font_01_sfnt_off00008aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA6 14484 bytes
SHA-256: 0cfa413fcb3ee8fbd9ec5061b5702299b3e68fce9bac7644368ffefefda7096d

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