Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d523b74489b50fe…

MALICIOUS

PDF

38.8 KB Created: 2020-08-21 14:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40a71eb254197e0b8d3a1f1f9d5cf4e SHA-1: 58c35cd60fe5e3d3e413218df73ce1c150897e06 SHA-256: 3d523b74489b50fead1fd63f495444858658e8bef882f68c859820a1aa475ec3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'evowars.io hacked apk' and the malicious URL, suggesting a lure to download potentially compromised game information. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=evowars.+io+hacked+apk
    • http://taworera.jesusonegeneration.org/uploads/1/3/1/4/131406082/wupisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90142435821.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/24544598162.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/gojuwaguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/59350419341.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/rexegusituvoko.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/ain_t_no_sunshine_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/sidadunulixeravogedunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/chrome_android_taskbar_bottom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/70034683125.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/67355398362.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/kagarinus.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_off000059b0.bin
83ffa8e06bf6c97795269de4295e81305be48d405c5f294d24d9d7939b4a9c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B0 5332 bytes
font_01_sfnt_off00006be9.bin
d531683c37c546e8b89b99f59cdf5647055515d0c9ca8fdd421e4d38cde0b090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE9 10296 bytes

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