Malicious PDF — malware analysis report

Static analysis result for SHA-256 c773782a30b86d1c…

MALICIOUS

PDF

58.0 KB Created: 2020-08-06 08:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7e983d84531351eb3e1ab73ccc09105 SHA-1: 336643e71731f01e530a108fe0627cea5b4aedf9 SHA-256: c773782a30b86d1ccc7dd49b96b78b610c78a8700a7ebe22828122d51481feb4
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a link to a PDF file related to landscaping. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. 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=landscaping+and+ornamental+horticulture+pdf
    • http://files.stillwaterfiretower.com/uploads/1/3/0/7/130775850/pikakixaxefoga.pdf
    • http://files.asobiteppanyaki.com/uploads/1/3/1/6/131637255/a4fe0fbcc200d40.pdf
    • http://files.isdrc.net/uploads/1/3/1/3/131398110/kijatog_nivowinid_busixalosagatom.pdf
    • http://files.annepwert.com/uploads/1/3/0/8/130813592/454a6cd0c.pdf
    • http://files.bestyou-functionalhealthclinic.co.uk/uploads/1/3/0/8/130874046/4f9967.pdf
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/rafutebimoxesamavujopako.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/74255701700.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/tetebavapalexesuwukujol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/99004320227.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/wobosula.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/puvowolubinu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/nulatatexiwotuforawadibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/61842922454.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/wastewater_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/56063339380.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/89384619755.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_off0000a4ee.bin
af48bcf5b6ca1bea50a40e9b785dba2eea765ed7a9aeb81398f7ea00d369cd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EE 5508 bytes
font_01_sfnt_off0000b786.bin
ff98654efa8638c1c0fd34fb7a1c8facd25b05b4a2dbb935ba809ec07d31282e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB786 10272 bytes

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