Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de73fe640f9d258…

MALICIOUS

PDF

42.3 KB Created: 2020-08-16 18:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87c3c695fd987b50af8a1de2d62c8406 SHA-1: 05b97a84c7627bd01c63f70a4c12671ebe456aa6 SHA-256: 2de73fe640f9d25837ae5d34a3170b547174d885bd478697fc33a39bcfed0e84
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=free+printable+writing+worksheets+for+middle+school'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though partially corrupted, also contains the primary malicious URL and several benign-looking Shopify URLs, suggesting a lure to disguise malicious redirection. The file's purpose appears to be directing users to malicious infrastructure under the guise of providing free educational resources.

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.com/pify?keyword=free+printable+writing+worksheets+for+middle+school
    • http://xaxepero.mrgunsplace.com/uploads/1/3/2/8/132814930/lapaxaxagow_vowogir_xujoko_jaduj.pdf
    • http://files.angiecoyle.com/uploads/1/3/1/6/131606169/0329169d16a2.pdf
    • http://files.martialhartamas.com/uploads/1/3/0/8/130814279/6186ec0be38b.pdf
    • http://files.erinburns.com/uploads/1/3/1/4/131414561/9299382.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/xero_accounting_software_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/xolisolojilurig.pdf
    • https://cdn.shopify.com/s/files/1/0436/7994/0761/files/jisawowidubax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/kusolekeputulusemetikukis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/81790735380.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/4119435314.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/nizigavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/rubazasireluzorifeburur.pdf
    • https://cdn.shopify.com/s/files/1/0438/9735/6443/files/49cc_scooter_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/13116339584.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/jopaponofopazafe.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_off00006694.bin
22d49bb85268e28ea94174308a78c9b08da7816aa880b5228b2c51c6f80b6f1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 5820 bytes
font_01_sfnt_off00007a42.bin
43189b2f2252f4956a3afe4baecf160bd23e4a65b5dca4cf329b8538444d77d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A42 9980 bytes