Malicious PDF — malware analysis report

Static analysis result for SHA-256 314061c38f60db97…

MALICIOUS

PDF

34.1 KB Created: 2020-08-27 21:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74db231bc07d7ad9c2f85519e436fba0 SHA-1: 2df3cc3e803068057c6907f786f909baa881e948 SHA-256: 314061c38f60db97587e0e7ff1b873b03c398b70f469bfc3921a1ca940673590
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, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=semillas+de+grandeza', is flagged as malicious. The document body, though partially corrupted, contains the same lure text and a reference to this malicious URL, reinforcing the redirection attempt. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to manipulate search engine results or distribute further 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.ru/pify?keyword=semillas+de+grandeza
    • http://tuxaxozet.paramountrec.com/uploads/1/3/2/7/132740373/nodaxodolumijab-xikubatebe.pdf
    • https://cdn.shopify.com/s/files/1/0462/1300/5466/files/freckleton_c_of_e_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/ant_design_form_reset.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/sorting_and_searching_algorithms_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/jumbling_reasoning_question.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/69732054592.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/sulazipenata.pdf
    • https://cdn.shopify.com/s/files/1/0436/9727/5033/files/nibejudonezotamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21096031872.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/acrobat_reader_for_windows_8_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2889/6161/files/7745763832.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_off000044a2.bin
7f98d7a9eb47c429c7b88091b1e309d37bad1e7dc94c5f94ad04e4a6287b9a05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44A2 5300 bytes
font_01_sfnt_off0000568a.bin
26dcaa14abc68e135f87f3b993b4fd9cb174f99450e559d353d05b11ecd8e787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568A 10972 bytes

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