Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09e620d55bd23e9…

MALICIOUS

PDF

43.5 KB Created: 2020-09-11 06:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 035f67940e9f5b89d21edbbde8415f53 SHA-1: 7faf218b5e03a930a42ff607549dda7371ec7b33 SHA-256: e09e620d55bd23e941d6222ed37a45a85bf9b5c24a70d542fe1849b2dd5470a5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free age calculator app. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation to improve the chances of the malicious link being discovered.

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=age+calculator+app+free++for+pc
    • http://luxudima.herbesque.com/uploads/1/3/1/0/131070792/geruraponake.pdf
    • http://pomela.hearthandhomechef.com/uploads/1/3/0/7/130739098/c3878e82.pdf
    • https://static.usrfiles.com/ugd/9edd50_2f4717c7d1d54376a52a3657fc9c340f.pdf
    • https://static.usrfiles.com/ugd/f0b6b3_96a05407d3db4743b4ffd932ce940ec9.pdf
    • https://static.usrfiles.com/ugd/b8c837_697aaf178e0b4b4287b4993b826fa0c9.pdf
    • https://static.usrfiles.com/ugd/a07927_94cb213bb849486f9d0d1adc9db944f3.pdf
    • https://static.usrfiles.com/ugd/2f3216_21f5fe7661a14798ac8fc3429da2a7f2.pdf
    • https://static.usrfiles.com/ugd/18574e_6dd0cdb3244b496ab2a1024b418071bc.pdf
    • https://static.usrfiles.com/ugd/dcfb95_357470580253497381803b6c50780da8.pdf
    • https://static.usrfiles.com/ugd/f523c3_b4526287166146469180aa56f18bb56f.pdf
    • https://static.usrfiles.com/ugd/4826f5_13b3ade4b0404d909c57e10c8fae6ed0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d24675b4c5149198d1408813808f92c.pdf
    • https://static.usrfiles.com/ugd/9058e5_2aba8d343b9a44b1bc8fc59f029655bf.pdf
    • https://static.usrfiles.com/ugd/868b90_b6a2afe1ae14485e90af4dfdde1163c1.pdf
    • https://static.usrfiles.com/ugd/77941b_88d7e8f297a845e58734b8ef3e272a7d.pdf
    • https://static.usrfiles.com/ugd/d79848_1cfc52011bc14d828da47efea7e3c1be.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_off00006ce3.bin
ceb401f898446ad27d8eb85468ab4b906155671ac0d4a70da3ba7b4a8584f859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE3 4992 bytes
font_01_sfnt_off00007dfb.bin
e3fff62b806832ea7476ea004a706ef0a132b184e57cde760eda0568ca8ce5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 10136 bytes

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