Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c2b63f2888edc5…

MALICIOUS

PDF

73.4 KB Created: 2020-08-31 23:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9326997783f8b8a505323adbdcf58be5 SHA-1: 3cd1daf7c15690a552b95676f08f543ac2e8dc4c SHA-256: 64c2b63f2888edc5f625574b8357a642db6ed436a103df25178154598b8afb46
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.link/pify?keyword=guided+walks+bibbulmun+track'. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to disguise malicious content as information about guided walks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=guided+walks+bibbulmun+track In 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://static.usrfiles.com/ugd/b8c837_1b115f2842dc46fd86c817f23cd85627.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e9e83_63884e86f4834c33b1e89bc73910f399.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea5d7b_eb7e25d9e79a49e192855c186fed6fc5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4d9df525fec94099a8c97dcaba23c6f5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/81765030704.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1e4819_7f38682d5ef84e9fbd282d19d35cf5fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9e41f0_02d2124127384962ac7f3add96fb32c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dd980_cb304e73649f461abaf19093ebdd92e5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a382ee_ebce0db55e0d4906a7e6b2faf9f42272.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c6c1_c3534745c94b4034a189e36dda6aff7c.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_off0000d4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F5 5184 bytes
SHA-256: ea5c783b8ddbde48f8fe11b37ae863c02f9149ef281e954af38a4f5ccc42c50a
font_01_sfnt_off0000e68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 10592 bytes
SHA-256: e4f7d35daab0eda232fd13b779fb0d4b5d29a3ac81a5a58c579a437973ebd7f8
font_02_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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