Malicious PDF — malware analysis report

Static analysis result for SHA-256 a675a0104432e574…

MALICIOUS

PDF

32.5 KB Created: 2020-08-30 09:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67809c8b95a9d1eb34b31c61144a3848 SHA-1: d04a4e4b60dfa9715252292ef791836b70e11302 SHA-256: a675a0104432e5745d2d8efb76f2992d6ddd8af1752a530d4f1fbfb50e4e1f3d
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=lainitas+primer+grado' which is likely intended to trick the user into clicking it. The presence of numerous benign-looking PDF links suggests an attempt to disguise malicious activity within a larger, seemingly legitimate set of resources.

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.club/wix?keyword=lainitas+primer+grado
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/frequency_of_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/2284/3036/files/exercice_de_logique_combinatoire.pdf
    • https://cdn.shopify.com/s/files/1/0468/8769/8589/files/kumofax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdf
    • https://static.usrfiles.com/ugd/0aab01_38bcbbfecab0450883bc1efb99de13fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_48ec684d3f1248b9b2c7d97761c96360.pdf
    • https://static.usrfiles.com/ugd/b8c837_74d49489ccae40119cda99f384d04bb7.pdf
    • https://static.usrfiles.com/ugd/61f964_2f00418410e842a6bd91f23c73b5e525.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e4e60300a364766892853ec9bd7eabb.pdf
    • https://static.usrfiles.com/ugd/6cf392_90df1661d9fb4b3b8e8f404168194175.pdf
    • https://static.usrfiles.com/ugd/65b209_e0f741970ecc4d9c817ee4045b8d4bd2.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_off0000433b.bin
c544b5fab78a088f1f5b90443d5d473b29043b302b24b5293ca760f8cd7cfb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x433B 5188 bytes
font_01_sfnt_off000054c3.bin
2b125c030c03e3de8ad6d66a2d5b48a073d95ffbbad0d3749076e423891e0fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C3 9824 bytes

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