Malicious PDF — malware analysis report

Static analysis result for SHA-256 5438cd1aeaab4011…

MALICIOUS

PDF

46.1 KB Created: 2020-11-01 15:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 687b4ff375447a09158bfc041565bd20 SHA-1: 5f4baceb11d3d536c5279edcf2fbc7c346bfb81d SHA-256: 5438cd1aeaab40110385d95e284d6f5b3b4414c7c546cd9eed2516ce8fd194d9
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.me/123?keyword=the+science+of+getting+rich+pdf+public+domain In PDF document text
    • https://zufakuka.weebly.com/uploads/1/3/4/3/134343409/wesukejizawovedej.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/ff2cfd4e5da2e1.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/xomekonepisesoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8003/3474/files/what_rapper_turned_actor_had_a_hit_with_the_1988_song_parents_just_dont_understand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0397/5098/files/cheat_mobile_legend_adventure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5564/4823/files/mu_tigers_football_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/83184266290.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/nusodasikudulanewamikugew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7756/5337/files/cant_delete_a_worksheet_in_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/tempe_center_for_the_arts_blood_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/medical_office_cleaning_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3165/7130/files/tiny_origami_heart_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/8836/0626/files/80859412756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8887/9010/files/28409913826.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 5540 bytes
SHA-256: d6b8f87461fec14f74e73018968e3ec3cbee937c6b23a3781fc6655482489343
font_01_sfnt_off00007981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 10404 bytes
SHA-256: 5611b5f7648b9d6cf886dd742d71e1883db6e6f05b277b46826302fcf05f3caa
font_02_sfnt_off00009d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D40 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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