Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ff6dffa5bfe5c4…

MALICIOUS

PDF

44.7 KB Created: 2020-10-27 15:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b6a7fd2c7b8c0de233f2fc70f7265c SHA-1: 7c1f550f34d78733a987b8e88a86bffd75bc23d8 SHA-256: 57ff6dffa5bfe5c4f559a24da1164d9ce838f0ebf6c121ca319d6a3ba50e92e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/123?keyword=megabus+vegas+to+phoenix', points to known malicious redirector infrastructure. The presence of a link farm and a malicious redirector suggests the document is intended to lure users to malicious sites, likely for phishing or to download further malware.

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.cc/123?keyword=megabus+vegas+to+phoenix
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5f95279cb66cf.pdf
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f873fc940293.pdf
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f94977b6dbd6.pdf
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f929881ecbc5.pdf
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f8a7d7f46996.pdf
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5f97ccdd1d2e0.pdf
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5f8ebad322b37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7f3a9811-5725-4259-92bf-a266e55ec10b/35569368294.pdf
    • https://uploads.strikinglycdn.com/files/7a773b20-5897-4c42-8520-cdc01fdcf419/zazijuduvesoz.pdf
    • https://uploads.strikinglycdn.com/files/6f381148-c8cb-4b57-b892-fc7e0df10dbf/23910048739.pdf
    • https://uploads.strikinglycdn.com/files/7570c03a-2430-48f7-a244-08ffe02b9d20/fumevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/human_anatomy_lab_manual_with_cat_dissections_answers.pdf
    • https://cdn.shopify.com/s/files/1/0502/5805/1255/files/putevejuvegupedo.pdf
    • https://cdn.shopify.com/s/files/1/0266/7580/6391/files/pleasant_plains_il.pdf
    • https://cdn.shopify.com/s/files/1/0484/6875/4594/files/19602692850.pdf
    • https://uploads.strikinglycdn.com/files/26775352-bb6b-4359-9206-82ef5b32fda0/52833195025.pdf
    • https://uploads.strikinglycdn.com/files/a1050c50-50fa-450a-a0cc-27be0b5dca3b/exercice_corrig_diagramme_de_pert_et_gantt.pdf
    • https://uploads.strikinglycdn.com/files/4f9ae71c-15ec-4b9a-a30c-d142d64c6f84/jubotusimoniw.pdf
    • https://uploads.strikinglycdn.com/files/68a9179f-6158-469b-beca-643545002a53/20565331126.pdf
    • https://uploads.strikinglycdn.com/files/733b1aa1-8bdb-476a-a15a-d97c6058c926/71709462080.pdf
    • https://uploads.strikinglycdn.com/files/4b3d70e2-a7a3-40ca-a699-dfa7842c46c7/nixoxotuburo.pdf
    • https://uploads.strikinglycdn.com/files/4c5a016e-69d2-481c-ae95-d464243f59a4/52330876517.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e15.bin
30c3bd4b4b785d100a1598bfd1db5e78f36b607ec98afc4c0ad855d1fda571b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 5228 bytes
font_01_sfnt_off00007fec.bin
676479391c17273a8230b25643c9e80de0b3f88516d6c1f51adc3d399adfeed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEC 10964 bytes