Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3becb84997acac…

MALICIOUS

PDF

80.1 KB Created: 2020-08-31 16:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f5437764029935c78c4b035fd650d8e SHA-1: 20e85a26d8fba20008cdce5ef9334690d3efd21b SHA-256: 8f3becb84997acac75d0fb6a9d7956a31b8e142ebce30e5dbc35652f7b4330ef
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://ttraff.club/wix?keyword=template+ecommerce+html+css+free', is presented in a context suggesting it's a lure for e-commerce templates, likely to deceive users into visiting a malicious site.

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.club/wix?keyword=template+ecommerce+html+css+free
    • https://static.usrfiles.com/ugd/b8c837_b47d828a797a41e9897790c396789d76.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_627047c3cf09467b8ac85060ef5a0c01.pdf
    • https://static.usrfiles.com/ugd/5e8de6_0e68202ecc3a45c8bfacbc484b80651d.pdf
    • https://cdn.shopify.com/s/files/1/0435/8019/4975/files/pacific_textiles_holdings_ltd_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/pinchot_park_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/6388/3429/files/jesufifabezepidewinazija.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/mercury_outboard_serial_number_year_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/cao_beveiliging_2020.pdf
    • https://static.usrfiles.com/ugd/3f80ec_33f7b00893734973a874aba30bbf4ff9.pdf
    • https://static.usrfiles.com/ugd/74a852_6066a24957964c2b91b2e0b7d61a1fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_958296bf50a54ab59f4d998d3d98c7f3.pdf
    • https://static.usrfiles.com/ugd/253000_4c866f400ba14941aeadad40a3b76397.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c0ceca269946ed84108e499f627310.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_off0000fdaf.bin
836f97741732bbe31283149ecef17a84087029ff0a24ea3a8aca83c33617d48b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 5204 bytes
font_01_sfnt_off00010f30.bin
e47ab471669cc2c85f70b4744462df7f14c35f0aba5bb37d87691d23eb87bcce
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 10580 bytes