Malicious PDF — malware analysis report

Static analysis result for SHA-256 6308e45a18978372…

MALICIOUS

PDF

60.6 KB Created: 2020-10-17 17:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c5de9f4a9c93eaa02b1756ec82257dbb SHA-1: fe982995b567a8f8fdf5f036dd814832a60e41aa SHA-256: 6308e45a18978372b385bf731388a3f633b4a97f5075f4869918d8803b3dec46
194 Risk Score

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.club/123?keyword=vocabulaire+restaurant+anglais+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8ac037af011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8926b5684da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8739bb69047.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/1/0498/7433/7947/files/kenmore_dishwasher_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/android_app_games_to_play_with_friends.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6566/3384/files/class_of_chordates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2435/4975/files/12839668638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3812/6492/files/24225908760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0891/2291/files/86635508891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6976/6302/files/nerok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5482/0247/files/usatestprep_answers_physical_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/two_way_table_conditional_probability_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/rajazilojuwarevera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9395/1132/files/restaurant_opportunities_center_pittsburgh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9320/7461/files/5637479109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2416/1704/files/yaesu_ft-7800_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/medical_certificate_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9359/9410/files/verses_of_praise_and_adoration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad139ec-2829-4bb0-902d-466870a54583/96294250331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a16f4e-c3ab-4f0c-951f-17a25489c4d3/jigisufozedozuze.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_off00009cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD8 5428 bytes
SHA-256: 278abf6ff9b692abfad809a71abb887d605fa840e3a7a65a5a9c0d9d653e8391
font_01_sfnt_off0000af4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4A 17144 bytes
SHA-256: 8c4d0aebce2900f21c2df134e653036749e3109d1fcf8510de4d80156a6d49ee

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