Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60a44d1aa1e4a3c…

MALICIOUS

PDF

59.3 KB Created: 2020-08-31 01:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dc9d582c1df9b6c70e57dcb388db6f5 SHA-1: bf2f8a2ce2f8d65965a00beb86161e4ed1e3b3d6 SHA-256: b60a44d1aa1e4a3cce7220d385063b712526a7b2ef247a2d0f11739a9f59cbc7
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. One of the linked URLs, https://ttraff.ru/wix?keyword=por+derecho+de+sangre, is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains references to the redirector URL, suggesting a malicious intent to lure users to potentially harmful 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/wix?keyword=por+derecho+de+sangre
    • https://static.usrfiles.com/ugd/b8c837_98478dc31e284e2fb0c3df768bf16f52.pdf
    • https://static.usrfiles.com/ugd/b8c837_a50c5eb6719045658286e5b0bcf964b7.pdf
    • https://static.usrfiles.com/ugd/6df952_ad72f07de9c0411aba44db65bf10fbe5.pdf
    • https://static.usrfiles.com/ugd/0aab01_c59a5fe92d424ccf9f2700a0e8149b09.pdf
    • https://static.usrfiles.com/ugd/99965f_c8b57025e0634445b780fd22f3be34c2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1707/files/27825220895.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/ximurax.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/sum_of_interior_angles_of_triangles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0827/files/bifonorenazejus.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/ad_d_2e_player_s_handbook.pdf
    • https://static.usrfiles.com/ugd/55f640_5b041db67dc4433abb1c2e97ec08ceab.pdf
    • https://static.usrfiles.com/ugd/89c6ad_23852ecd6cca4727902a4dd681a2a069.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_e029bdcfbbd44aae8fa77074ebe08575.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc438509ef674caf95ed813883331695.pdf
    • https://static.usrfiles.com/ugd/9757e7_b83e92dd3af9499386a149de121c29b0.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_off0000a7bc.bin
6327b82f1b609d136ea1c30097cba0463b53e6fc9f1bca1f79fff31c5f81109e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BC 5168 bytes
font_01_sfnt_off0000b948.bin
dbb8bde817e174f10190af050d75010fbf4bfa94e29ae603ace430baeb34c558		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB948 11584 bytes

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