Malicious PDF — malware analysis report

Static analysis result for SHA-256 b814860e8e16d30c…

MALICIOUS

PDF

33.5 KB Created: 2020-11-01 17:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bc53cb3a0e13605c852b56214faf28f8 SHA-1: d11a2ccc1c8048bd2470166df58cf8d8b631e737 SHA-256: b814860e8e16d30c12b258817aa349285abefd110c33ebea54adf7bd2801657c
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=nikki+facebook+profiles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f91aaf57aa8b.pdfIn PDF document text
    • https://zagusopiv.weebly.com/uploads/1/3/4/2/134234894/xirejepakad.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/supurobisovireta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5f9eae240238c.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/cf5cc4.pdfIn 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/1/0266/8445/7140/files/bimukixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8139/2838/files/sabamufetifixekalev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b933be9d-d676-4100-a2ad-e26b76f4a270/the_burnout_society.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3775/2996/files/24361562353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1434/5661/files/94515056446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8434/1950/files/arbortech_turbo_plane_ebay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/queensbury_high_school.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_off00004596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4596 5180 bytes
SHA-256: 39926ae76064db7483da35c969bdbe1e235c95f77df3549c3a7ead817b8435ab
font_01_sfnt_off00005750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5750 10412 bytes
SHA-256: 8232faefe086f94d874c8268fd01de82d441bf1c5a66d9d68fde5dd487aec1c1

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