Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca2df727c51e38c…

MALICIOUS

PDF

84.1 KB Created: 2020-09-21 04:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fcb292d50f7e40c13c98611ace3eca24 SHA-1: 1ce22081467f192e58b5ee0b83e61fd18df547d8 SHA-256: fca2df727c51e38c00a024b0afca195340cecc85fe589ffddce3c901f1d3b09e
154 Risk Score

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 0.9999

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/wix?keyword=subwoofer+bass+pro+3.1.4+apk+mod In PDF document text
    • http://files.masconometdigitalphotography.com/uploads/1/3/1/6/131606113/efd5e.pdfIn PDF document text
    • http://vesapi.burki-lab.net/uploads/1/3/1/4/131408502/vilidaxupepexa_mawegerinabesu_zinaxeda_pibexe.pdfIn PDF document text
    • http://files.nicolagiuliato.com/uploads/1/3/0/7/130738870/eb4564.pdfIn PDF document text
    • http://files.jayenn.com/uploads/1/3/0/7/130738914/nezamelumesoli-natogemam-diwoza-zupaxogefop.pdfIn PDF document text
    • http://files.pnwtowing.com/uploads/1/3/0/7/130738620/gapod_gulijinaripaxak_doxikirumedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1126c831-b3dd-44ad-b125-d3f73c7c1e54.filesusr.com/ugd/3db607_95c1dcc18b454fd199543fdff9e7b25c.pdf?index=trueIn PDF document text
    • https://08467687-b31f-43ff-9487-e49669a4746f.filesusr.com/ugd/bca722_8e5e2af5892e4d37ba70cf9eb762c764.pdf?index=trueIn PDF document text
    • https://5e095057-0108-4baa-8d31-16fd0d501533.filesusr.com/ugd/3b0c81_25e763126a89467e80ac4c0e17eebfe4.pdf?index=trueIn PDF document text
    • https://a1b1f041-2061-4163-bd66-e9516fc34975.filesusr.com/ugd/f84671_856364cd68e946bbbf3d02fe36a6e3a0.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/domabulujufevutesuwazunap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/67993864067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1979/9192/files/quotes_from_twilight_eclipse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/tiworavaxomilumalak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/bawudetaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8923/8685/files/63855087043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/mubapapofegafif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/download_english_picture_dictionary.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F7 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 5892 bytes
SHA-256: 4dc9d72cf7e603a4211a477a7b09624147264176546f2bc442247fd37d6d114a
font_02_sfnt_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 5512 bytes
SHA-256: bf671cf1c1467db45d646df8ccd448bcee2d6224445f3e4a55a444d8dbaa8c32
font_03_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 14004 bytes
SHA-256: cd8bd65e6ce3441762d2ca114d89d22086c4f378111a96e9e2ad14893a20b880
font_04_sfnt_off00012b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B52 16432 bytes
SHA-256: 4978da13f98723f667a7e9c404d709ff9016fb9e945489f47c9f8cbf5eb10800