Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3190119e465ccab…

MALICIOUS

PDF

40.7 KB Created: 2020-09-01 02:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a009c3fe05edc9c4d01e70f56853f76d SHA-1: 5b31e401ad481401c3ac0c0ad2c7c99c5cccd03f SHA-256: d3190119e465ccab0cdc17641aa206629ccee64e453921c27f8839d092a633f8
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link leading to a known malicious redirector. The document body, though partially corrupted, indicates a lure related to 'Navigation bar apk without root'. This suggests the PDF is designed to trick users into clicking malicious links, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=navigation+bar+apk+without+root
    • https://cdn.shopify.com/s/files/1/0462/1503/7082/files/fundamentos_de_epidemiologia_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2726/files/73241628304.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/39969952153.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/cercanias_plano.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/manureronukesosab.pdf
    • https://cdn.shopify.com/s/files/1/0450/0835/5486/files/pevabivijilegogalezo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7322/3321/files/tufowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/komixopivejukirolefunet.pdf
    • https://static.usrfiles.com/ugd/b914b5_80db5e00b793401b8be6cd1d7ac2087a.pdf
    • https://static.usrfiles.com/ugd/0f1814_e028a1fc75dc4680b2371d0f45f3eece.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_off0000617a.bin
d48a37554246e83aa01f5cd69708cec0db0652bd068866d7a9061a8482484d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5196 bytes
font_01_sfnt_off00007340.bin
43add29bf45451ce3f60e9121e1150ad520c4225f0c8c9a3516b8a5d46f2c55f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7340 10384 bytes

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