Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc464d695046b3f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-29 12:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b51abd9edc162890f7b9f2257b9d01a9 SHA-1: 23ed80ff60f3824f9a0da28343570c295e3ea43f SHA-256: 8fc464d695046b3f7f7bd7e69b439e901c2ae91cde356eaad206cfd45d0ef320
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of the URL in the document body. The ML classifier also strongly indicated maliciousness. The document appears to be a lure, using a popular game title to entice clicks on a link that leads to malicious infrastructure.

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=baldur%2527+s+gate%253A+descent+into+avernus+pdf
    • https://static.usrfiles.com/ugd/b8c837_157440d2edae43d6b7bdffdd7c5d561d.pdf
    • https://static.usrfiles.com/ugd/b8c837_78a87964cf96490f80862d766b1b745e.pdf
    • https://static.usrfiles.com/ugd/b8c837_81611af586b04fcfa36ba52566eaba96.pdf
    • https://static.usrfiles.com/ugd/b8c837_680cec348eef439dabd0a506550f8eb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/37814485112.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/balajixiwisif.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/zawopajudulubuvomugexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/super_mario_64_wad_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6847/0936/files/just_paste_it.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/takopoxokezuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/setajojekakal.pdf
    • https://static.usrfiles.com/ugd/b8c837_53cc515528e94828ba874173d79c483e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5277eca5a5074731b7d767ee6dcde841.pdf
    • https://static.usrfiles.com/ugd/b8c837_45c65d7afac4466f8a70de0837cfa42f.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_off0000629c.bin
c6fe9aef672c17c76f9c284b7458c54ed5a594f86a116a878f03afff7b6244b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 1644 bytes
font_01_sfnt_off00006aca.bin
bb2a48f0fe7d6621ae8ab61fa2b718e055dcd752b56759447004970fce1ab3e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 5516 bytes
font_02_sfnt_off00007da9.bin
090dd0cdd4e92e155c97628ca244486cd2c942d5527065fdde23675e8e0e4388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA9 13196 bytes

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