Malicious PDF — malware analysis report

Static analysis result for SHA-256 f821bf0bbf652ca7…

MALICIOUS

PDF

110.4 KB Created: 2020-07-28 08:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45e147ebf8f366a094967925620b2fd7 SHA-1: 6e63cc7d1570462a0032d995ea33db7d11330433 SHA-256: f821bf0bbf652ca793a11595adb57c04ce09fb857ab7cf7ec5c869b19dbc616a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates an attempt to redirect users to potentially harmful content. Additionally, a PDF SEO link farm heuristic was triggered, suggesting the document is part of a larger scheme to generate traffic or distribute malicious links. The document body, though heavily obfuscated, contains text related to medical guidelines, likely serving as a lure.

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=chest+guidelines+anticoagulation+for+atrial+fibrillation
    • http://files.swimpristine.ca/uploads/1/3/1/3/131380619/6d7962e2d.pdf
    • http://files.wesleytbrown.com/uploads/1/3/0/8/130813860/e04440f9a9e7.pdf
    • http://files.lezcycles.com/uploads/1/3/1/3/131379554/sibeti-jomopoxowaj-fojogiku.pdf
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/ribapegividupofewezup.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/sagomubinudotafawijamopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/tuwabonepiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/lugojatozutadaxoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/17114745817.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/1075909121.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/62006759428.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/55806859186.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/37981902118.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/67239086060.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/rarazaluga.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/64657162706.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/kodomirasovewam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47247601930.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_off000175f5.bin
916e6e33fddd07f79f3a8ae274ced2c65e6efd39a130bce8d975ee7d9cd5fc27
pdf-font-stream PDF embedded font (sfnt) at offset 0x175F5 5328 bytes
font_01_sfnt_off00018804.bin
eb8fddc6d9100302834b9ab0c7cd5faf22077404df23ceeb374fcf926da3e6a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x18804 10396 bytes