Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfae896afd008002…

MALICIOUS

PDF

70.0 KB Created: 2020-12-19 07:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f30b119fa3acf9cb2518d4ebc915f410 SHA-1: 271fae25bc61e159fba482fa9f4ac0c37de0ece4 SHA-256: cfae896afd00800299df41c910d534fbfb61407314257d5f41f16fda82794a23
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The document body, though heavily obfuscated, contains references to 'game development book' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous embedded links, many pointing to benign PDF hosting sites, further supports the link farm heuristic, indicating an attempt to obscure the malicious redirector among many other links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/strik?utm_term=c%252B%252B+game+development+book In PDF document text
    • https://tatabakag.weebly.com/uploads/1/3/4/8/134885094/f9e390.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd37885b7bc966055e0d98/t/5fdd5c88a3b92b153c0b62c3/1608342665051/26789126172.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf4562c6de34c7a380f8c/1606218838423/three_mistakes_of_my_life_free_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14293d79-5632-43a4-8115-2977b829f852/31083318658.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dofiweg.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/pawelipabedibowuliturulu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e92a0a2757459be2ed0b/t/5fc45b615147b14804be0675/1606703970178/development_across_the_lifespan_8th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/arabische_tastatur_chip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e58ff13-222e-4249-ad59-b5d51290cbd3/the_power_of_birthdays_stars_and_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84f4777-5d33-4f0e-bdac-966bb9bec404/exterminators_for_bees_near_me_estimate.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd391cd610986319751208/t/5fdd7e83f5f642265633d4be/1608351364927/jugexepuwidabupiguwifina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce522f0db0542b884ff03d/t/5fd1bb1eebc7ce75e8b13e4a/1607580448798/wekulosunavuvaluxogo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbcbbf71053ccb0ffb78/t/5fc3fbf23c02f22b9d8891dd/1606679539141/30_day_squat_challenge_results_before_and_after_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a51779-7406-4f7d-846d-71a4f933ef1e/908_bel_air_road_redfin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e5a4ec-a34a-4534-9390-fcb507f9c7f2/small_cargo_trailers_for_sale.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 5176 bytes
SHA-256: db51f4d1a3a313acca9715908712b9363d6e76d51867fdc14ea1715b1645322d
font_01_sfnt_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 10004 bytes
SHA-256: 6237849f032f950f9df8a1b20955fb9955e45f95347500c15175bf1ae7de4d06

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