Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacc1131e69017d1…

MALICIOUS

PDF

36.6 KB Created: 2020-09-06 12:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: deb3bf047454a64c143a156f4cead850 SHA-1: b599df8454517d2bb63c9a1801fe34f14bc36b00 SHA-256: eacc1131e69017d127c925ef90101d6057872bf53fc9c31e973e59a9f6f0314f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one pointing to a known malicious redirector and many others forming a link farm. The presence of a malicious redirector suggests an attempt to lure users to harmful sites. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=backseat+ari+lennox In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/6cf392_9a8c55cb0d864f428fcab862619f8a63.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a421e3_12c322b46e9a49db8f38a9b4a8ca59e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/607883_f20284f7476044dd8c49e378e755eaf1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/599f1c_ff78ae29bc334f4f874ded6acb6a1a67.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c83fdb_6cc1db10d7964a4494e06aaa72bb3257.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4ae4db_b09bfa0768424cd480157d09e40b46f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/805d2a_fd0e13a41d724aec933abefebaa51ed8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0237/9939/files/bamefawijodibipasama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/pdf_editor_online_chrome_extension.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/accounting_format_excel_red.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/hi_ranger_bucket_truck_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6422/1077/files/vazegibum.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bd1c09_cdb4da5d0b69429081558eba90e06d01.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d51d36_6be635ad99384b0fb06b4ae93f90b5a8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/289c5e_96c24e5acf8f41269b09ae0949e4abb1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/92ee2b_66af6ea2a37d4005ba6dd3adfcdceef5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3283b0_9917382c52c647f5bcb512b4ec0379d7.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_off0000519e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519E 4972 bytes
SHA-256: 881c58847e8dabc93ced64d13c981b5c92cf115868fa21f6342c1e54717e4a96
font_01_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 10612 bytes
SHA-256: 3fd79f5c194d4564156455ec88ba78e31eae26a6ee9f3afbc147e5f533ce5eca

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