Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d13b34c917ab0e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 22:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf49f1d0384b1607b29895d3b63ed730 SHA-1: bf097cb18af8f28d7561ef2490df4e0b479d3317 SHA-256: 50d13b34c917ab0eded629fec6d34a91976be5460805d91163122de9b48c52fd
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, indicative of a link farm or SEO spam campaign. The primary malicious URL identified is 'https://ttraff.me/wix?keyword=jersey+city+erotic+massage', which is likely used to redirect users to unwanted content. The document body, though heavily obfuscated, also contains this URL and other PDF links.

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.me/wix?keyword=jersey+city+erotic+massage
    • https://static.usrfiles.com/ugd/b8c837_8cd1292e9ead4f618a76e543a41f38bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc4b0fb973df4c05af7f3551f36f48c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0666e95256234955a04ebe5362be9d6f.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/capsule_size_chart_acg.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/tragedy_of_great_power_politics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/48760454119.pdf
    • https://static.usrfiles.com/ugd/52b593_b20fdf9c1a794519be3a957142434ead.pdf
    • https://static.usrfiles.com/ugd/913720_8d29fd6915c546d3aae9975a51a295e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed9871661708467aadf8c849b8467d8d.pdf
    • https://static.usrfiles.com/ugd/10e3af_fd87448f3bfe406baaf220cdb8c9a19c.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/9591866737.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/sozogaditov.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9639/files/anatomie_pied_os.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/lokiwijol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/68727073777.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_off0000686f.bin
a956d5aa45f9aa20450ad4b4b71f4d8581771be2df8ca4f5519c4dda19c8234a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686F 5176 bytes
font_01_sfnt_off000079f8.bin
cdbff319461b63c33551bb6334c92cdd0bcffeb8f6476d648e4c482675f96c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F8 10260 bytes

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