Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45b2c204295f695…

MALICIOUS

PDF

58.6 KB Created: 2020-09-08 13:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d1f589b92b2717938081e0254547907c SHA-1: 95c653b65da0d521fe12b2f95ff3622f0e089d10 SHA-256: f45b2c204295f6957c93f137a43192e13f116a9562da68c66d0e23c5aaa4ab27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, including one identified as a malicious redirector. The document's apparent purpose is to act as a link farm, directing users to potentially harmful websites. 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=adaptive+optics+in+ground+based+telescopes+pdf 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/1/0429/6769/5509/files/hoover_windtunnel_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/taxonupaxuwelegesizamuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/61425893572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/66619786460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7483/7923/files/toggle_button_color_android.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7ab08_9b572c55b16143c789146e99485cc96d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/61f964_f36c6e0f67f546e88adc9f3e72f9a9ab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90661f_887c8537ffd34c348be5343ca2d871bc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/02631b_eb80beda1cb041c7ae4d8e5956bc457c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5f226e_cb877139ad5e437a99443b1dac1ffc67.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ebb60_4a5265f96e604f9687421ccbbdb8f629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/44939303638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/mipafepidanofefade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/zerenanigipivevivelubu.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_off0000a67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA67A 5512 bytes
SHA-256: 1e0f1989e66239238fa378755a4411a878722d65959ab833f40d3d0eb8022105
font_01_sfnt_off0000b94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94A 10704 bytes
SHA-256: 44d0478dcae4623e01e1329d7189ee03b04de3bfc947b63cb8439b2e821e67d4

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