Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa71eed5e8ef282…

MALICIOUS

PDF

40.7 KB Created: 2020-09-01 15:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ef15d9e7ca61b1c056348c07f55207b SHA-1: 17d685d71ccf9ae91f7814f41fb405ba705a289a SHA-256: 4fa71eed5e8ef282bc6b85900d7241dd21835691e2320e74ba54458fce670445
120 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/wix?keyword=wedding+invitation+design+templates+photoshop`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content under the guise of providing design templates.

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/wix?keyword=wedding+invitation+design+templates+photoshop
    • https://cdn.shopify.com/s/files/1/0463/3523/0114/files/upsc_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/arabisches_alphabet_tabelle.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/94485262691.pdf
    • https://static.usrfiles.com/ugd/d99ef3_2742619fcb5c4142be440510a2ed1b54.pdf
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/biology_miller_and_levine_teacher_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/bleacher_report_nfl_week_1_picks_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/pdf_file_reader_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/mcgraw_hill_algebra_2_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/the_strange_case_of_benjamin_button.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6341/files/hitchhiker_s_guide_to_the_galaxy_cast.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/27917689084.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/waxiwuwumoxilax.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_off0000610c.bin
6ed2975b3b8c8b8553cfd7da522aef57ef7fb493d596f67f1d2776c62c3d7154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610C 5348 bytes
font_01_sfnt_off0000732c.bin
b08880fad45813b081c35c66d56fb27df8089ad49b75171e4625a481ca71a746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732C 10128 bytes

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