Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ee9be01e66cbc5…

MALICIOUS

PDF

46.0 KB Created: 2020-10-23 03:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eb6e43878325dc0761b6b3fe2f2cf3df SHA-1: c81b0b081ea1d7149c5ad08a3b6051bf17dc0d38 SHA-256: 79ee9be01e66cbc52c3c1b583027042ff6c670af4dd5eaf6f9bcbcb107e1e0a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 19 external PDF links, one of which, 'ttraff.link', is known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect users to potentially malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.link/pify?keyword=dialogos+en+espa%25C3%25B1ol+de+2+personas+pdf In 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/1/0268/7673/9770/files/oval_window_function_stapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2786/files/crash_bandicoot_gems_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4313/1044/files/stream_detective_pikachu_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/kitegek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e88b2c64-7578-4182-a889-58c1d2481d17/jewuzadezize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289e6f99-2e61-48b7-98cc-313cac44e8bf/xibofasisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2411d32e-1ce3-43fd-8b5b-b1881448f86c/napafirolomowir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48c3d8e-b116-4479-a69a-4f7e86cea0ad/paloranajexovot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f0c012-1cc1-466c-b39f-24915592b568/guwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ab4ac8-eb4f-4355-a6ff-8825d1b2d2a4/juki_flora_deluxe_5500_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39940b7-5772-408f-b21b-7aa80874e598/duvapujepobele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbec5035-ccfa-4634-8042-b4bf90fbb9d5/download_civilization_ii_fantastic_w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fe5ed8-37b9-4aab-ad60-2e96b7d20d68/bezigonujuvob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7d9349-7827-4b89-8d0e-899fd1fb68b2/37064701444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42043b5f-5831-4927-a936-edec79d0a2f2/queen_rearing_calendar_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3502/1471/files/beterosilesigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6677/7500/files/guru99_manual_testing_test_cases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1518/3777/files/android_pie_multitasking_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0190/3769/files/android_outlook_app_wont_sync_contacts.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_off00006fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA5 5552 bytes
SHA-256: 4233beec9bf53b609cd475abd2e97c57a6f0e0f33f19fe8771c7410d55aba8b7
font_01_sfnt_off00008250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8250 11792 bytes
SHA-256: 14e593228ddaac0d7bef2933fa85755047af2a472bd97e3255e48cc1f58a51e4

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