Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fdf85ed4f1877a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 13:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 444b5671443f9a7d2350b288c637e619 SHA-1: b2374ac8de3fd629bce4763d0f69a9595f02e4a7 SHA-256: 50fdf85ed4f1877a0e247341d0bdad213829d330f6ef47ddc98397c3f221d244
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/pify?keyword=sky+blue+background+hd+wallpaper, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary lure. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.com/pify?keyword=sky+blue+background+hd+wallpaper
    • http://rulega.wrangellboatshop.com/uploads/1/3/1/4/131437850/3189870.pdf
    • http://files.saban-kazim.com/uploads/1/3/1/8/131871644/01cf269ea.pdf
    • http://files.arsherbarium.com/uploads/1/3/1/6/131637108/e4adceb6ab3.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/filtration_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/xosijagutofugasizewubodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/39230919659.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/vamuxis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/19366622886.pdf
    • https://cdn.shopify.com/s/files/1/0437/6169/6925/files/one_dimensional_array_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/jadobabuseku.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/fafuper.pdf
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/calendar_october_2019_printable.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/mamasusiponalofijejabax.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/69918863164.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_off0000616c.bin
cb0b025e43625fb2f7a362019448d2c909f8075bd746ed2f28cf29c544ff35bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 5660 bytes
font_01_sfnt_off000074ba.bin
cf53d1fecb7504e6e20c624f15a576b3b033d61a5e5f9f07da72a91b135cbb13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BA 9728 bytes

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