Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c311f15c6da290…

MALICIOUS

PDF

74.5 KB Created: 2020-08-23 12:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a5931b658b473301f2ce4f3e42004e SHA-1: d3d1becee2c3810346711c05c9143e20d0a8361c SHA-256: c1c311f15c6da29073d6472770a01ca93a2f88e4ebb0ac620a716f860dc9f3c4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=we+bare+bears+name+template'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify-hosted PDFs, suggesting an attempt to obscure the malicious destination or engage in SEO abuse for distribution. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of the malicious redirector URL strongly indicates a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=we+bare+bears+name+template
    • http://files.angelwicbathbody.net/uploads/1/3/1/3/131398000/jikob-revamutotu-sukoxope-xubumomojer.pdf
    • http://files.workingmolossersunited.com/uploads/1/3/1/1/131164440/gibadenapijedux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21154843933.pdf
    • https://cdn.shopify.com/s/files/1/0440/6394/8950/files/4034486197.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/carbanions_and_their_reactions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/binomio_de_newton_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/70296561909.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/steve_yegge_amazon.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/complex_numbers_pdf_sakshi_education.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/jugeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/bacteriologia_resumo.pdf
    • https://cdn.shopify.com/s/files/1/0463/3133/0721/files/24257266060.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/allison_transmission_troubleshooting_manual.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_off0000d318.bin
4100cff0311f04f52eff5f11f9e11dc6758f36da573c1d4dc5b172feb57afe70
pdf-font-stream PDF embedded font (sfnt) at offset 0xD318 4748 bytes
font_01_sfnt_off0000e316.bin
f7a5aff8620ac02e161f5cf80516035788fb5bdefe10c2dbf849c8aea1d76218
pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 13848 bytes
font_02_sfnt_off00010ead.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 4324 bytes