Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f57d3947a701f63…

MALICIOUS

PDF

38.3 KB Created: 2020-08-18 18:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bda0b2852911cb5f8330151bbd265dd SHA-1: aeb2c3608f9f2a8a718e2a978202350f8b9b67ee SHA-256: 7f57d3947a701f63baa6abcde38b01c8e1cfaf667ce2e0e2f417a2561d535647
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains the lure text 'Aunt minnie radiology cases pdf' and the malicious URL, suggesting the intent is to trick the user into visiting the redirector. The presence of numerous PDF links indicates a link farm SEO tactic to improve search engine ranking for malicious content.

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=aunt+minnie+radiology+cases+pdf
    • http://files.summitrootsfarm.co/uploads/1/3/1/4/131453543/6806273.pdf
    • http://files.athenskidsmart.com/uploads/1/3/0/9/130969751/5336a6e6f9ad.pdf
    • http://files.studiosfinearts.com/uploads/1/3/2/6/132681204/zizaxovojenanamiliz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bepojarovizezeba.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/temubisevaxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7797/3654/files/45183310879.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/24341062579.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/piriformis_muscle_stretcher.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/42375849551.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/personal_statement_sample_essays.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/22062477166.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/ziwijotapar.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_off00005698.bin
d63b8505eda5d2efb0d806e87ff8cda4b2a485d57125496b2e9cae61262b7182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5698 5564 bytes
font_01_sfnt_off00006972.bin
f483a6186456cbae66aa258f7fb1724949c7f293218053316aede283c9ccec06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6972 10192 bytes

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