Malicious PDF — malware analysis report

Static analysis result for SHA-256 5053349a3885a256…

MALICIOUS

PDF

68.5 KB Created: 2020-08-30 07:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 407ca964e0c5efcccb50c1dfabcdb4b2 SHA-1: 2ece2e1aac192f35db4607ab23cb65532e9e99e1 SHA-256: 5053349a3885a256628df4110a02b8cf9b33df31f160297d7678112605ef77e0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=revista+interviu+pdf+gratis'. This indicates an attempt to redirect the user to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a tactic to artificially inflate search engine rankings or distribute malicious links. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links, reinforcing the lure.

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=revista+interviu+pdf+gratis
    • https://static.usrfiles.com/ugd/b8c837_35130c0df6dd4341b1707073b8656f67.pdf
    • https://static.usrfiles.com/ugd/ce14f3_27af5aa73b424b6881df031fde250f6c.pdf
    • https://static.usrfiles.com/ugd/9e41f0_a5cde7fee056433bbbf15fcf3d16872a.pdf
    • https://static.usrfiles.com/ugd/2813e2_5927cb5c69af4535871b695d158f67e3.pdf
    • https://static.usrfiles.com/ugd/cb5dea_6e0637ed9e464a88ac9e0734e02e8407.pdf
    • https://static.usrfiles.com/ugd/3bca44_9aaa23960ad04d2db4bbc42275ef343f.pdf
    • https://static.usrfiles.com/ugd/66c878_d103988ba38c4828bb65213689a38c52.pdf
    • https://static.usrfiles.com/ugd/b8c837_06a290a14c7b4918819c938994945933.pdf
    • https://static.usrfiles.com/ugd/61b8bf_b24afd48dd334b3b9010bc0e81ed79bf.pdf
    • https://static.usrfiles.com/ugd/de3d83_e5b460b2395d4695be1b3435298b4ab3.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/97370602772.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/bozug.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/38320157442.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://static.usrfiles.com/ugd/b8c837_29c4422ba14d45ce876f176104308f4b.pdf
    • https://static.usrfiles.com/ugd/cb5dea_bb67750841e14543952e1a93851d9bc7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ba.bin
411b7402023b13981155f267b3f4b8f76897b3d43fdac21fac8acd0b42c248e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BA 5244 bytes
font_01_sfnt_off0000c6ac.bin
8661dd82f7d229f812d19379a4d4313b8b17cc9523474650b5ab7d97229ffb6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 12368 bytes
font_02_sfnt_off0000edb2.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 16312 bytes