Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c046dcd1bdeca7…

MALICIOUS

PDF

38.4 KB Created: 2020-10-01 08:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 363b8f38d48f5e5fbc919d3914965b89 SHA-1: 18f004a86c1e55d29f3899a9e4532f4d3bc84744 SHA-256: 43c046dcd1bdeca7bb0eb0232a575e07e96f748f2df34aa5d6e7d7c5d055feb1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9994

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=stages+of+grief+in+spanish+pdf In PDF document text
    • https://site-1038714.mozfiles.com/files/1038714/53428934271.pdfIn PDF document text
    • https://site-1039861.mozfiles.com/files/1039861/zibadamafemi.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/majixokitokaxugosuj.pdfIn PDF document text
    • https://site-1040132.mozfiles.com/files/1040132/19846547899.pdfIn PDF document text
    • https://site-1038332.mozfiles.com/files/1038332/nonuxepojanog.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/1/0432/1191/5421/files/94999391671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1295/1961/files/cdse_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4853/6730/files/61340734049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/prefix_suffix_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/bhaagamathie_movie_telugu_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6746db9-2fbf-4cf7-82c8-5035cf87b1c7/52633619675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506b670b-d1a4-4118-9f8a-bf494e6cd181/xasisilapajowipezarafisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7731/1395/files/rojekunikat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/63075423141.pdfIn 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_off00005c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C69 5376 bytes
SHA-256: e9b499d102594db58368dd8441425583d6a687badb6a1936dcad402cdad7e165
font_01_sfnt_off00006ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00007736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7736 10352 bytes
SHA-256: 5649cc17493ce56c53f44ef19e749ca5b7fc568f459621f15e1a3077097bec0d