Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d66d4a86640f678…

MALICIOUS

PDF

39.1 KB Created: 2020-09-08 19:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 78e89e93c56b72f62fe3d4dc997adceb SHA-1: 7460be096728e617c6782801361584647de8df8c SHA-256: 0d66d4a86640f678bbc04af15159ab78ffc548355394980949d4d90a81c1b3b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to ingredients and links to external PDF files, suggesting a lure to a link farm. The ML classifier strongly indicated maliciousness, supporting the presence of malicious redirector infrastructure.

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=dq+sheet+cake+ingredients 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/17beed_28e2cc74a652410496c241c50e5944d2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2d1648_bf6545446ce64be6be5d2e01763df9ba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e02969_0af00042e06240fb8661f567adaca2b5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9f69bd_10388bfa432c49ffa9564ad4ccba2da3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76156b_985f6c0c934647f3b357f5e42f8929e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_88574f32a474429e86cb0524108e9c2d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/173616_3bd14b8cbb294d76b820baee37fc1e38.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/22228740053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/56571409010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/8460/2532/files/styles_of_report_writing_in_research_methodology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/gears_5_collectibles_guide_act_1.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_off00005974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5974 5356 bytes
SHA-256: 87aa143f063a65a8fb3ebc8a5130d82bed4f2fa80f087e7ae641707f79e04be3
font_01_sfnt_off00006ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA8 10880 bytes
SHA-256: 4c6e5922d53252db368fb4cc43941ec68fe9afe3efb90232436853bd467aeb5b

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