Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3117c60f7dee0bf…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 15:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e211329e7b14a82672c84ddefb83a591 SHA-1: 7b2593090450f5893db6de332ae9223dc260fe08 SHA-256: a3117c60f7dee0bfdf4b0d40f38921a097e55482e37a8847f61ea9e9c6eeaa75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that this URL is part of infrastructure used for malicious purposes. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the PDF is designed to host numerous links, likely for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=720p+hd+camera+eyewear+user+manual+pdf
    • http://wulebu.belindadurrant.co.uk/uploads/1/3/2/6/132683001/1458476.pdf
    • http://files.hilgar.com/uploads/1/3/1/4/131453031/61188864e35af6.pdf
    • http://files.cinetikfit.com/uploads/1/3/1/6/131637482/zibuxagotulorisodame.pdf
    • http://dabis.larasanusi.com/uploads/1/3/1/3/131379326/jibozemuz-rejiraxiso-gikurufenoge-gafewuzup.pdf
    • http://files.marshallglassgc.com/uploads/1/3/2/6/132681779/5567940.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/non_associative_learning.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/ar_desai_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/64203602596.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/pajujemi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/55235647207.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/xugajawipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/xibowigegetenisibikisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/39129432757.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_off0000624d.bin
1cfc65467c7a44957e96736ae969562306abe1e74622b262ae3b05db158b7af4
pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 5848 bytes
font_01_sfnt_off00007622.bin
8f61a9ec867117e976e235184ec86eb537d7365a895fa2a0ec7530d7d84fc180
pdf-font-stream PDF embedded font (sfnt) at offset 0x7622 14236 bytes