Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8939f5957f9dcb…

MALICIOUS

PDF

44.1 KB Created: 2020-09-07 19:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015426a92827c5d8ebed94a976b372ee SHA-1: 9f433c880430bb81e70b77a95d6ff32462e48c03 SHA-256: bd8939f5957f9dcbd48457300f0928dae2927c28eca05747928bc9d4fbcfdca3
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.club/wix?keyword=appreciation+to+employee+for+outstanding+performance', suggesting a lure to a malicious site. The presence of numerous other PDF links points to a link farm strategy, likely for SEO poisoning or distributing further malicious content.

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.club/wix?keyword=appreciation+to+employee+for+outstanding+performance
    • https://static.usrfiles.com/ugd/3fd21f_4623ca2e71ad4858aa87f6d7aab246d0.pdf
    • https://static.usrfiles.com/ugd/6260fe_7e21c462f75444bc9998f024eeef1c04.pdf
    • https://static.usrfiles.com/ugd/e1d12c_a7d59fe9ed6241a98ef61b46dc58ba07.pdf
    • https://static.usrfiles.com/ugd/8ab72e_43632739b64440f3a1f275174d449253.pdf
    • https://static.usrfiles.com/ugd/b148e5_2dd5eb1efc4d4c2c871ee76c71be83ec.pdf
    • https://static.usrfiles.com/ugd/822ecd_0ff9c311e66d43cb9571611535861245.pdf
    • https://static.usrfiles.com/ugd/39cb9d_f8ca71cb73ea4df8a45a15b482b4f69b.pdf
    • https://static.usrfiles.com/ugd/5f4192_eefe94f2cc23429e847c8c3319c355e2.pdf
    • https://static.usrfiles.com/ugd/7cefa9_c4dc70949b6e471fa8812f08b0dab14c.pdf
    • https://static.usrfiles.com/ugd/89c6ad_4b91eaabac9a4f20a2fd675106bf541c.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9101/files/gigukoxet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/ditoperagifefiwazajiriga.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/lutevore.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/38912899039.pdf
    • https://cdn.shopify.com/s/files/1/0447/1685/1356/files/believer_sheet_music_free.pdf
    • https://static.usrfiles.com/ugd/b222ea_c2292954c2e6412fa7258faf2063145f.pdf
    • https://static.usrfiles.com/ugd/7e84b7_0efa8c3e2a2f4bb9aa5fb1426aa17ac6.pdf
    • https://static.usrfiles.com/ugd/c618e9_876e69fa77bc4751861a97b102d1aaa1.pdf
    • https://static.usrfiles.com/ugd/822ecd_932f2f41b612488b91f7c6c29700d2d9.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_off00006d07.bin
2ef26f73a5094e11a106aa2f2aa0406362cfd68723e7b19e4abee021f4e24932
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D07 5564 bytes
font_01_sfnt_off00007ff3.bin
a8ca38555cb673012765914e926632628831f8a539469f8b7beed788fedb87fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 10248 bytes