Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ebbfabb05ecc41…

MALICIOUS

PDF

72.9 KB Created: 2020-08-26 03:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52aba44fe2be81dc159ff2ede9866c78 SHA-1: 0127f508c70f07d75bbe03605a4b4e1956c8f22c SHA-256: 36ebbfabb05ecc4143ee5867e3f7f31ee995c1f9aed991d3ea8301d13299fddf
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a large number of embedded links, a technique often used in SEO poisoning or phishing campaigns to redirect users to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=%25D9%2583%25D9%258A%25D9%2581%25D9%258A%25D8%25A9+%25D8%25AA%25D8%25B4%25D9%2581%25D9%258A%25D8%25B1+html+%25D9%2581%25D9%258A+%25D8%25AC%25D8%25A7%25D9%2581%25D8%25A7%25D8%25B3%25D9%2583%25D8%25B1%25D8%25A8%25D8%25AA, which is flagged as a known malicious redirector. While many other links point to shopify.com, these are likely part of a link farm designed to improve search engine ranking for the malicious content.

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=%25D9%2583%25D9%258A%25D9%2581%25D9%258A%25D8%25A9+%25D8%25AA%25D8%25B4%25D9%2581%25D9%258A%25D8%25B1+html+%25D9%2581%25D9%258A+%25D8%25AC%25D8%25A7%25D9%2581%25D8%25A7%25D8%25B3%25D9%2583%25D8%25B1%25D8%25A8%25D8%25AA
    • http://files.hourglassfitnessclub.co.uk/uploads/1/3/1/3/131379183/viraxowipu.pdf
    • http://files.dicastables.com/uploads/1/3/1/4/131483440/8631764.pdf
    • http://files.lovethelordfirstministries.com/uploads/1/3/1/3/131383727/dexewajanoriraxe.pdf
    • http://files.ccsfmarketing.com/uploads/1/3/0/8/130814252/4859033.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/mokavix.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0990/files/posazeragid.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/81449753217.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/melawiladifugajofule.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/14643820877.pdf
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/lupudeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/6952/9509/files/54345716131.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/mapidedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/74746730839.pdf
    • https://cdn.shopify.com/s/files/1/0436/8665/8213/files/bexokijarusedajugamozoxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/apprendre_l_italien_facilement.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/71148494870.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000ce56.bin
1daa646b93fe4d42ac824582d446aa60784be787f2951f69f94a854f378cb26f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCE56 31100 bytes
font_00_sfnt_off000085a9.bin
e5120bcdfdc9bc80c2848cc67f8ecfd10525e3f39e6e335f30237642edd8d698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A9 3752 bytes
font_01_sfnt_off00009234.bin
f51a0e88342a79e977deef2b6e6afe4aa0f3cd4480e28821c223b84fd778cd7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9234 18052 bytes
font_02_sfnt_off0000ada4.bin
d05d4affc2cb492e8a869bf430e9411d32a163ad2064b18a7da5895f96e7ef29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADA4 9492 bytes
font_04_sfnt_off000104f1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 4324 bytes

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