Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34d607cbb2bd9f2…

MALICIOUS

PDF

48.4 KB Created: 2020-11-01 18:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6485deae3c869a43c1128adb9c55230e SHA-1: d8fec2c59043397cf8d0f0ddb072e5c88ee683e8 SHA-256: d34d607cbb2bd9f2823cbe62d7b34a6d3775266a19b5ac79543ea4f7ddb5a8ac
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=parse+theory+of+human+becoming+explained In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8a0455c5ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f8b5ebd0bf21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f9adfa457590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5f9b57200cc83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_5f9d5fe052eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_5f9a8efa6f36e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5f9bb226bfc06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5f8bda8adb8b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4643/1637/files/67567203721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4d2ec5-6caa-42bc-b3a3-161fcd6b60d6/mawexunilujubematap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9300/9608/files/irs_publication_523_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cca25c-e332-4b31-888d-04564cfc2cc7/mefaguxadunatoxuwil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7241/4380/files/kimeretuwoxufulati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2577/4754/files/la_luna_sangre_august_10_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E52 5760 bytes
SHA-256: 19b02187574b1da78fd39619cd44f4603846f6a7b67bfd05714b607fdf2b1e85
font_01_sfnt_off000081c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C4 10568 bytes
SHA-256: d24c463daa61477623efe2423e3cac45f03f5a56e641e32612efe179f4b7a089
font_02_sfnt_off0000a5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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