Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37552c1b7ddf3cf…

MALICIOUS

PDF

55.2 KB Created: 2020-08-21 11:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae1750e3502d4293d30bfa49d756c2b SHA-1: 822ea7eb1ee0483c8496c86236aeb6a1464c7019 SHA-256: b37552c1b7ddf3cf86d71914265411b98fe14ab0fec651a5f13883bd556f3f49
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical redirector link pointing to 'https://ttraff.cc/pify?keyword=vscode+format+document+indent'. This indicates a social engineering attempt to trick users into clicking the link, likely leading to a malicious payload. The document body, though heavily obfuscated, contains references to VSCode formatting, suggesting a lure to disguise the malicious intent. The presence of numerous links to external PDFs, many hosted on Shopify, further supports the link farm heuristic.

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://ttraff.cc/pify?keyword=vscode+format+document+indent
    • http://files.hinghamwomensclub.org/uploads/1/3/1/4/131454521/kewadinod.pdf
    • http://sukoma.sirreileffects.com/uploads/1/3/0/7/130775195/lajutuditoza-soxezezobituj-rirokagen-fomabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7192/2591/files/62604983064.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/pagajepovisadabisige.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/14731051941.pdf
    • https://cdn.shopify.com/s/files/1/0449/8771/1656/files/ccna_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/boogie_a_form_of_swing_dance.pdf
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/mebovunizabekidugabusib.pdf
    • https://cdn.shopify.com/s/files/1/0438/4292/8790/files/58549231537.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6175/files/18032449957.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/complete_crafting_overhaul_requiem.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/capteur__ultrasons.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/mipoxorexedoxixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/foxasujaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/6286/8633/files/86233138139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f3a.bin
a4bdf1730063539db652ef2de60182e0873205558fa6cc9df0f1b6862227771f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3A 5100 bytes
font_01_sfnt_off00009071.bin
37d8ac0023b513e03afbf836101594f0dd68702501137fbbe5cd3465f78c7fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x9071 12432 bytes
font_02_sfnt_off0000b8cf.bin
0da4aba4f8eb37177c825521433d1eaa19ff0c1d0304946ce0745890dda606db
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CF 16576 bytes