Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ab70d2b1da4359…

MALICIOUS

PDF

48.4 KB Created: 2020-08-14 05:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 931e52edb22cce555b252e94bf515fad SHA-1: 8e1464eb98e69310901e91d8369f2d727e8fa0ca SHA-256: f3ab70d2b1da4359e526a2cda3cbc6c78739f5a1ed4a163888ad05b62dad1888
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=performance+appraisal+answers+for+nurses'. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The file's purpose appears to be directing users to malicious sites under the guise of providing useful information.

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=performance+appraisal+answers+for+nurses
    • http://zemanu.reddeerjusticefilmfest.ca/uploads/1/3/1/3/131384429/wusakum.pdf
    • http://labuf.gvphoto.org/uploads/1/3/1/3/131383332/berexugob.pdf
    • http://files.allstaraussies.org/uploads/1/3/1/8/131857334/492575.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/dash_button_setup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/fallout_4_perk_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/jiruzigajolaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8454/files/axial_scx10_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/99051116203.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/canada_post_letter_rates.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/career_path_finder_after_12th.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/vutobitusoropagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/15226627706.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/gepitilusenopekinupu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/zazefuduxupopitudopoged.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/adwords_express_promotion_code.pdf
    • https://cdn.shopify.com/s/files/1/0436/0113/3731/files/zonaletomalapevufego.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_off00008080.bin
59674aab7f412cde36c84302bac9f7172ab48b9066d52b94cb33610836ead96d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8080 5252 bytes
font_01_sfnt_off00009251.bin
7e12c933e03da62339b2b02e59937e44f136a448860494ac94fcf8a17a649bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9251 10088 bytes

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