Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8139a704134ddf9…

MALICIOUS

PDF

42.4 KB Created: 2020-09-05 13:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62a1052785792c90f8ee3154f50f8945 SHA-1: 77641104be627c6d12a919ed4051ff8db6640151 SHA-256: b8139a704134ddf9782931f15a61b6d5de21a9b5d3a806686068609925793daf
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific link that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the target URL. The primary attack vector appears to be social engineering, tricking the user into clicking a malicious link disguised as a relevant PDF. No scripts were extracted, limiting the analysis of further stages.

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=ontolog%25C3%25ADa+significado+pdf
    • https://static.usrfiles.com/ugd/1f2646_fe083a472ba84a5591ffe3174f58d0f5.pdf
    • https://static.usrfiles.com/ugd/b52961_4987414426ae4da1a1c2cf733af720b5.pdf
    • https://static.usrfiles.com/ugd/735189_6fac4b91d1eb4d0fb921db40f2b80679.pdf
    • https://static.usrfiles.com/ugd/b8c837_4641cd3f38434792bf12e4f0fd3a7cff.pdf
    • https://static.usrfiles.com/ugd/f63f29_b06e5ab7a84c4a20a35f7adf679caa6a.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/38268208260.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/mary_carey_xxx.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/bupaxepikuramesabop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/49270397974.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/27958488846.pdf
    • https://cdn.shopify.com/s/files/1/0461/0903/2612/files/poemas_de_gustavo_adolfo_becquer.pdf
    • https://static.usrfiles.com/ugd/b8c837_97bb5a741a0e419a82bba4f1c117ca3a.pdf
    • https://static.usrfiles.com/ugd/735424_3cd5f1dfd30c46c79a5ed4edf5870e39.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_off0000615b.bin
19af223f5c97e2ef9c15f51c3c539b0bb3a4b59f2a3e099f8016a961157a8d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 5308 bytes
font_01_sfnt_off00007387.bin
a1a54f7457eb886766a7316e53ff2ab305fe9a2ff68443c7c0573e6a549a3351		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 12164 bytes

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