Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c35ee0cf0b3338a…

MALICIOUS

PDF

42.3 KB Created: 2020-10-28 10:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 544fad25d18f19c61c16aaa43802201f SHA-1: c4b299733bff4bb0414ebfb8a97432e0795f3d5c SHA-256: 5c35ee0cf0b3338a719794ef2fa56577ee6da0464f3ee01eda1b39485adeb595
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.link/pify?keyword=social+security+office+bronx+10451 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5f95dff522522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8dda4cd0524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f9171328e7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f9819bbe635e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f8f56dba1d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5f95dbc0871c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f87d49b348e5.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/1/0502/4887/6212/files/groove_music_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5668/2912/files/white_mountain_ice_creamery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0799/0184/files/prefixes_worksheets_for_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1689/files/in_defense_of_dangerous_ideas_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6294/6720/files/google_play_services_apk_android_5.1_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1786/8716/files/petelazemofenumun.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/fubunelopenetalufi.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/human_psychology_books_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/sovanapepumitedareli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce5dc87-0c94-4486-bf49-41f281610e15/pivegepen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c684aa8e-b94b-4b4d-9989-96ced9679584/37666219604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b240a321-0f3e-4c0f-b23a-7f08cf70d80f/23151935814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b8f9d5-dcdc-4318-89b8-955d7772b642/fund_of_knowledge_mental_status_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc9c1ef-2bb2-48b9-9959-a46bb0d0d841/70801367708.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_off000065e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E8 5692 bytes
SHA-256: 4afe8983282c501632ffaee8272166e5a6fe94ff9ad848fd4d8a4bbf4a3f86ce
font_01_sfnt_off00007966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 10072 bytes
SHA-256: 176dee11c5099566a5961332ad4ced0cd170d700fa3df235d455c8574cd369bf

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