Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ad355a14abf072…

MALICIOUS

PDF

36.7 KB Created: 2020-09-11 01:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a767baa526d186351aa721c11b13322 SHA-1: c4580927c1e997e11ba5abcd439b9eb26dc533b1 SHA-256: f8ad355a14abf0722565e6886843c775fc4009f2cce59a944cda30ebb13496a7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.me'. It also exhibits a PDF link farm, with many links pointing to external PDFs, some of which are hosted on potentially compromised domains. The document body, though heavily obfuscated, contains the target URL and references to 'avery template 8160 specs', suggesting a lure to disguise the malicious intent. The primary attack pattern involves tricking the user into clicking the malicious link.

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.me/wix?keyword=avery+template+8160+specs
    • http://files.weststormontwoodlandgroup.org.uk/uploads/1/3/1/0/131070894/2a976b3.pdf
    • http://files.gulfbreezehighschool.com/uploads/1/3/0/8/130874250/f69f373dd7.pdf
    • http://xugupebo.johndollar.org/uploads/1/3/1/3/131379069/9c63bc.pdf
    • https://cdn.shopify.com/s/files/1/0456/8471/9775/files/fire_accident_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/excel_2020_basic_formulas_and_functions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/sap_analysis_for_office_2._6_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/fogedakiniwaboxufapinomaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/dowry_prohibition_act_1961_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/pensum_ingenieria_industrial_uasd.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c20278505c14891a2e7a81577fb5f91.pdf
    • https://static.usrfiles.com/ugd/bfbc46_9e146114a3694d0885879d1393d500ce.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_off000050ad.bin
775a144e56fb2735b20f537b51efb0ee18a8c3c1d47342a89eb95cad589608f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AD 5772 bytes
font_01_sfnt_off0000644e.bin
0787d3b9f8efff8bf0849204da07da7c5ff97fe63fea95eadf3c515b6661d174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 10060 bytes

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