Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2dbc5a6e77482d…

MALICIOUS

PDF

49.9 KB Created: 2020-10-25 23:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 61863c9257f85ae334d03db445979f50 SHA-1: 14c723c21fba65ba6a64572d9a4ef4674cc758c0 SHA-256: 4e2dbc5a6e77482d63fe6ee541bcee505cbfc5372e016a000406d1d7f6e2ec79
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to academic topics and the URL 'https://ggtraff.ru/aws?keyword=bacterial+leaf+streak+of+rice+pdf', suggesting a lure to trick users into visiting malicious sites. The presence of multiple links to external PDFs, some hosted on platforms like Weebly and Strikingly, indicates a link farm or SEO poisoning attempt to distribute malicious 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://ggtraff.ru/aws?keyword=bacterial+leaf+streak+of+rice+pdf In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/3780305.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/2687075.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/9e901e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f89b9611c655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f8cd0b69d402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f879c43e8af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f93195a8e2a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f94b1051944f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f875f0fb8201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5f929a1f55c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f94b2c913cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f93f0ca99645.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1d0643-7ed0-435c-9f62-401cf338a900/31906002406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9486b797-e0a6-43f9-8189-e6e9824a0bb8/correio_convencional_vantagens_e_des.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e09c7a-96f2-4f76-ad1b-0886f4b597bb/codice_delle_comunicazioni_elettroniche.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4761f8b-0fd8-4ed8-be67-08058e25accc/titinaretowewifebomese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd9e0b9-22f2-4e18-a3a4-ec255857d148/58571380113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd730fa-b678-4f13-af43-540c97211b0a/79297609508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7700/9060/files/xirarowojoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3813/6232/files/prayer_journal_printables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/nirugejejuteraketebedopij.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_off0000810e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810E 5260 bytes
SHA-256: 05d9227070e61f2562afd307f40abefcfb703e594db7d88791f7522c82df367e
font_01_sfnt_off000092fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FD 11704 bytes
SHA-256: ad1a7153027c0e3e1c193075f474884e6b0075861d335a9e7f77f7462983d94f

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