Malicious PDF — malware analysis report

Static analysis result for SHA-256 7547933895b3536b…

MALICIOUS

PDF

61.9 KB Created: 2020-08-29 19:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 10cdc4528004b8d8bd015e28fbc77a1a SHA-1: db7edaa2b492987c8661892ef210dd964ddf0d1d SHA-256: 7547933895b3536bc413af6c904828b57119c0968118059d0ced88a1d3892c98
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.link', which is used to obscure the final destination. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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/wix?keyword=gakuen+shinshoku+xx+of+the+dead+torr 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/1/0433/9243/4343/files/arkansas_final_franchise_tax_report_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/5_finger_piano_songs_with_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/48990779754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/tiwajuxevoligazigatuzum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/definition_and_scope_of_international_relations.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3e7e3e65401943a5aa08e868718d254c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/286fb8_dc684ef8b4e94e7485faee4418ae717d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_9967514ab0b847f78821fd74fb51a3c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_54aff90327a942fe8d998f90f4cc31ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_60818dd9cbe14df4bd4bec0b9b691139.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2a2e8e66c18a498cbc81d98abc945bcc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/34ec99_d8890832a19a4174807f2bd2dded9121.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a18aa6_20d916a2498b4441bfe63cf69095b8da.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_off000090dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 6620 bytes
SHA-256: 27918cfdac0613e360a47759d443056fc2e785f35ba6ea2ecd4f13dbd4deec7f
font_01_sfnt_off0000a756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA756 5128 bytes
SHA-256: 2d3866d7c8ba6207416ebed2ec547f753d7748e683ec03c63433a9dcd14d641a
font_02_sfnt_off0000b8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CA 15400 bytes
SHA-256: d2264d44ce12ac8e536d3ac247d6bf32a48d80434ac350e0a40a471a0bf4b3d0

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