Malicious PDF — malware analysis report

Static analysis result for SHA-256 b527c4dfe38882b1…

MALICIOUS

PDF

40.5 KB Created: 2020-08-06 11:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185c287205d5f28ff40fc98b1f916c22 SHA-1: 9a613655f3449a304f847b9fed6224ef3f434031 SHA-256: b527c4dfe38882b1e34728768cc8a5a4f08075a000f970f3aa0231ebb49595f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link disguised as a 'Unilever annual report 2020 pdf' which redirects to the malicious domain ttraff.com. This domain is known to host redirector infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious lures. No scripts were extracted from this sample.

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.com/pify?keyword=unilever+annual+report+2020+pdf
    • http://files.amysclassiccandy.com/uploads/1/3/1/4/131453695/narawukut-rasan-nezogi.pdf
    • http://files.sanpeteseamless.com/uploads/1/3/0/8/130873728/899cb64bdc5acb.pdf
    • http://files.popgalleryorlando.com/uploads/1/3/1/4/131453006/d2e1e0b9ff6d1fb.pdf
    • http://files.stevenbriansutherland.com/uploads/1/3/0/9/130968934/3664726.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/77780258592.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/fozemirakevovutowunup.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/88353987741.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7397/files/61359897435.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/delirir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/jobogifiwena.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/54388293814.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/16216_copperfield_dr_33618.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f87.bin
edbb14f0d6044ee2428f94c565fa0d8513e338c7b680b451aa4eaf3141548717
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 5180 bytes
font_01_sfnt_off00007146.bin
89e7634cc27f77014e8570d61f0ca74e3bfd2113d2d44d6ce0ee3f7723659774
pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 10628 bytes