Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbd888fd1841eeb…

MALICIOUS

PDF

37.8 KB Created: 2020-11-03 05:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b57a51b555aff0a63a13b3da09dde24f SHA-1: e9f5c2e54de5e964a2cbb9b82b6f1a263b0a8699 SHA-256: 7bbd888fd1841eebc3e901369d6080edfcd9855b64e6cf106dca519fdba39395
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://ttraff.me/123?keyword=od+miller+electric In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f9a4bfcd136d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f89fd9d2ebbf.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/17b02e4b-448c-48b3-8cab-983aa1a7fa93/92423671331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eca0478-1326-4ebc-afa3-a000d6574822/35773732719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d322bb-cb46-463e-a696-09666b2d157e/27939155207.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/curriculum_vitae_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509577d6-8d42-40fb-a170-24e01943b7cf/47607770173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7632/6054/files/step_brothers_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6beb3a-1311-4ac5-9a4d-0b15d294fcb8/mozisegumeputi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e046c8d-3b5d-4a29-ad64-bca870519c05/gififefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a551c0-e54a-45a5-b5d5-cf699bb4b3f9/jovuwitokovir.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/fepumani.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_off0000568a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568A 4724 bytes
SHA-256: c005e36bce89c84b3633e65ee2cc1d3f491bacdde1d0730990ff477ab7faa10f
font_01_sfnt_off0000667c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667C 10696 bytes
SHA-256: 2ca42c4f98acb35016d4696a2702027ecba8d9e1399c1d100286b6fc85f53cae

Open this report in the interactive analyzer, or submit your own file for analysis.