Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a8e9f2cbd99922…

MALICIOUS

PDF

58.3 KB Created: 2020-08-15 19:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f4b63afd69954eabdec122b05d9b9c6 SHA-1: f57637375fc7fc5a87037eb30132463b58a79d7a SHA-256: 37a8e9f2cbd9992236f411a9784991de02fdb1eed84173896a6ad30fa0db1dbe
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'Reglamento de insumos para la salud vigente pdf' and includes a URL pointing to a malicious redirector. This suggests the PDF is designed to trick users into clicking malicious links, likely for phishing or to download further malware.

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.ru/wb?keyword=reglamento%20de%20insumos%20para%20la%20salud%20vigente%20pdf
    • http://fowujez.eliebaking.com/uploads/1/3/1/3/131383478/juxarabaga.pdf
    • http://zusisok.jeromebibleartmuseum.com/uploads/1/3/0/7/130740178/8650771.pdf
    • http://files.suzukimusicwinnipeg.com/uploads/1/3/1/3/131398547/9f6f62.pdf
    • http://files.mackatak.net/uploads/1/3/0/7/130740521/4093272.pdf
    • http://files.zmagazine.co/uploads/1/3/2/6/132695602/debot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/detidutiwagunifukogizeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/62113185684.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/lopiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/wirurevozepaxiditug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/lujegisos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/rabin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/58029122597.pdf
    • https://cdn.shopify.com/s/files/1/0438/1091/4466/files/altivar_11_instrukcja.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/census_2020_mp.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/12589090614.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/blood_hunter_order_of_the_lycan.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_off0000a260.bin
2685c80e2c9c92c2d2df4b076767924b06690104111e80c37ccafec9979ec6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA260 5428 bytes
font_01_sfnt_off0000b4d3.bin
a6b61046686ebfeb1594d6c1bc662170987cc7993fdf2d717b828466fe217261		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D3 11472 bytes

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