Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e11a1f6d7a2f9bf…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 05:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02363e80e06410a1caec0ecaf42631bf SHA-1: f808e80b27aee6f61c08ee1f7b005177ea26b942 SHA-256: 8e11a1f6d7a2f9bf6b70b414ed11e549f06227b6870ff52e2696b52357fb44bd
150 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, with 24 external PDF links identified. One of these links, 'https://ttraff.cc/wix?keyword=dark+souls+fat+roll+gif', is flagged as a known malicious redirector. The document body appears to be malformed or contains obfuscated text, but the presence of numerous links suggests a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=dark+souls+fat+roll+gif
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/fazonamokameluvuwazosure.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/xobegupel.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/51385868853.pdf
    • https://cdn.shopify.com/s/files/1/0437/3371/3050/files/70785906935.pdf
    • https://static.usrfiles.com/ugd/e8506d_5bf93a27502445b0ad57fe43de6b084c.pdf
    • https://static.usrfiles.com/ugd/1c90dc_36c887d3282c480fafe4c7786f2411b2.pdf
    • https://static.usrfiles.com/ugd/3b47cb_0a4dbeb5313b4439897d7cef5dfaf9bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2e58e398be845f0a68eaf279256ff45.pdf
    • https://static.usrfiles.com/ugd/b8c837_60789c81462d4bb8a0df1d37f5782e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7595ec1fb7c45d7a771cfcf7511a2e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b71178487f704287a6a27ae5abc15c90.pdf
    • https://static.usrfiles.com/ugd/822ecd_bec4bceaf459443f9ade1b46ed8029b9.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_off00005df2.bin
a291a6e4326b93d5790b4deea4a219c2927678f5dcfdc3d8ba3426c42f3149b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2 4996 bytes
font_01_sfnt_off00006f09.bin
a035e608220c2cd548e1d98914de49448c8314173e4acd210322236b7948e35a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 10376 bytes

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