Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4831f5cdb028309…

MALICIOUS

PDF

47.4 KB Created: 2020-08-09 21:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62ab680114b37fcfaf7ef23cff60daee SHA-1: 685d56f80380e1f024ba8e2c410d35397b0e5662 SHA-256: e4831f5cdb028309558f6811500f88030e6a20bffefc2d42be41f67afbe6d1d8
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically targeting a keyword related to medical information. The primary malicious URL identified is https://ttraff.com/pify?keyword=autoimmune+hemolytic+anemia+pathophysiology+pdf, which acts as a redirector. The document body, though heavily obfuscated, contains this URL and other links to Shopify domains, likely to appear legitimate. The heuristic firings indicate this PDF is part of a link farm and contains a malicious redirector.

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=autoimmune+hemolytic+anemia+pathophysiology+pdf
    • http://files.murphysheanon.ie/uploads/1/3/0/9/130969241/bf76e4aa2.pdf
    • http://files.systercute.com/uploads/1/3/0/8/130874064/3977918.pdf
    • http://files.nofakies.com/uploads/1/3/0/7/130739544/simaxute.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/13492379577.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/27031667967.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/buvizunuvasifilitesetudiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/kewinedisivimatezaleno.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/how_to_understand_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/bogobasawukedivexexis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/zexomimibaregagemepalaxoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/85346974220.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/paraphrase_with_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/pufumumenaxenedoxonegeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/galaxy_a50_specs.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/tusawat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/634636378.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bc.bin
3c89f5af21422bd9f481dd179acb173aa46eebf2326fb153f0a06f3223f961af
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 5448 bytes
font_01_sfnt_off00007b25.bin
1ba7e4d3ea81b4c7ef547d800b78c2efedd9e7f520e9b838ba325d08eae84d61
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 12228 bytes
font_02_sfnt_off0000a25a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA25A 4324 bytes