Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7926e1ae828a37…

MALICIOUS

PDF

54.5 KB Created: 2020-10-03 02:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d4f0101dac5c1e3b3f39abfbfbae7480 SHA-1: 63cda0c693822845d0c2fdd8635a6d53ee194dd9 SHA-256: 8d7926e1ae828a3730bbe9d785442fcc55dcd85ed9c974f0f97cdd6348275166
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to Shopify domains, suggesting an attempt to create an SEO link farm. One of these links, https://ttraff.club/pify?keyword=2006+ford+focus+zx4+fuse+box+diagram, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating its primary purpose is to redirect users to potentially 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.club/pify?keyword=2006+ford+focus+zx4+fuse+box+diagram In PDF document text
    • http://files.shadowpara.com/uploads/1/3/1/3/131398385/3919427.pdfIn PDF document text
    • http://wukag.purplepotters.com/uploads/1/3/2/6/132680874/sonamenebafivu_limenez.pdfIn PDF document text
    • http://files.shulman-writer.com/uploads/1/3/0/7/130739970/a80e4c53c4.pdfIn PDF document text
    • http://ligig.spiritdrivenevents.com/uploads/1/3/1/4/131408168/05c036407.pdfIn 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/1/0497/3766/2613/files/cacophony_and_euphony_difference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2697/9739/files/6966221073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6580/files/chiltons_repair_manual_online_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2002/7557/files/westinghouse_photoelectric_switch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5085/6348/files/11136345047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/48141557869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8646/6210/files/dakepimuxexodux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23434c2-99a3-4a1a-a1ce-dc4390770fd5/19359149312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46057872-e822-41d6-acbf-78ea5a03fdf2/fitis.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_off0000887e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887E 5988 bytes
SHA-256: 3b3ed3fef450960ab40733d12115ada1281f691e058488acef5afe846c703e13
font_01_sfnt_off00009cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDF 15056 bytes
SHA-256: 8d9a94fa003e0edac5389175c287e50c571729604932592b7d8051246585e050

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