Malicious PDF — malware analysis report

Static analysis result for SHA-256 48025d1250d1b34b…

MALICIOUS

PDF

47.6 KB Created: 2020-09-08 19:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b654e3b91b0f12b988ab43e7bae478df SHA-1: 61a3a2b6b68a52bc0a27f968c0321586ba3807d5 SHA-256: 48025d1250d1b34b9a630814e723b240bb6b477ca46d5d405b56abd054e30992
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a critical redirector link to 'ttraff.me', which is flagged as malicious. The document body and heuristics indicate a tactic of presenting a link farm, likely for SEO poisoning or spamming purposes, to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=heartbreak+lady+antebellum+song 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/1/0430/2556/3799/files/47057264505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0370/7298/files/following_directions_worksheets_for_first_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/kemixurixipifipojozosam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/nonajudonamelizofap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8921/5893/files/21301221384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/wwe_raw_introducer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7224/8215/files/13910241393.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fef806_38a6c379ae044a9ea1cd6b380a202540.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ae15ca_e6071d4b824f4e47a11c2ef19683ec04.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/585b1d_fd194051d5124730be9939e8671e2273.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/93971e_fa834770a92748d48fdac97172946fa2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/vojosobaleseduzow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/asme_section_viii_div_2.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 5412 bytes
SHA-256: a703fc4e36adbb7d34e1c42755c5ad457131d41c84eed03e58d28fa4006f541c
font_01_sfnt_off00007800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 10172 bytes
SHA-256: 6f566bd98cfa0f3e628bd914574d783ddd95fb35a8c55bc2176d0c8084ee458a
font_02_sfnt_off00009b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0E 16656 bytes
SHA-256: e6efce682a5fa7f72e9d39bee01ee2e18febe9d73a8b3ed81bceb0a46704932c

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