Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3adc74481fdd59…

MALICIOUS

PDF

35.4 KB Created: 2020-08-30 21:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6518fdb1815c357f2c5be74c6125329b SHA-1: 221b1c1160a9f5f9cc3462fbd22ee7d6779e4c5a SHA-256: 2c3adc74481fdd598b99fefb27f2073e3db16074bed4015a964f9077b29c78b6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. One critical heuristic identified a malicious redirector link, and another identified a link farm structure. The document body contains text related to 'Sistemas de control moderno dorf pdf', likely a lure to attract users to click on the malicious links.

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/wix?keyword=sistemas+de+control+moderno+dorf+pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/prentice_hall_biology_answer_keys.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/fifedigisoxef.pdf
    • https://cdn.shopify.com/s/files/1/0465/0146/2174/files/75769147818.pdf
    • https://static.usrfiles.com/ugd/b8c837_37139062dca7476993837f8d383cc0a0.pdf
    • https://static.usrfiles.com/ugd/f65175_4efa3ef7fa5848cb8d1646337342e013.pdf
    • https://static.usrfiles.com/ugd/b8c837_37dda59325b84745b1f6d33c61e9f468.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7d1e08b2b22426390614c8d885f4e7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2bacb699132473b95a56e6745e9b6dc.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/73583422272.pdf
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/52887169898.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7461/files/ultimo_aggiornamento_whatsapp_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/35072634963.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/laboratory_glassware_catalogue.pdf
    • https://static.usrfiles.com/ugd/b80405_1ae7cd70ecf6465eb7a8feec2d4e9cdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dfe8f8888b8491f80ea938412e789d6.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_off00004851.bin
16065f7401b9c25c9fab92565a6c46e64dcf21b8eed49c76cf4f9615f08f8392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4851 5404 bytes
font_01_sfnt_off00005a8c.bin
3ea90749d405b06aec079e10a5575c8570fd0fff06fdc3ae4ff9508220bd68a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8C 11728 bytes

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