Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48746de70430de4…

MALICIOUS

PDF

38.5 KB Created: 2020-08-03 02:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6b1d73b3c9bbacf3e0fda751bfbf444 SHA-1: 4f1383519414dd64ed60b154926a97bde447d1d3 SHA-256: e48746de70430de49da71d62f72f6ee48cc47a5e9890ea789b920ccded2983df
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 pointing to Shopify domains, which are likely part of an SEO link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=you+file+host'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=you+file+host
    • http://files.davidbateswriter.com/uploads/1/3/1/8/131871780/310dbe6798c.pdf
    • http://files.michaelbigelowdixon.com/uploads/1/3/0/7/130739285/xanitexipemopimo.pdf
    • http://files.ukerepublic.shop/uploads/1/3/1/3/131384113/dotutetef_lowet_zepuz_budarizif.pdf
    • http://files.authorresourcecentre.com/uploads/1/3/0/8/130814466/tibezuruw_vugofunu_soweredofawin.pdf
    • http://files.lutherpeople.org/uploads/1/3/2/6/132695280/2441430.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/76784868853.pdf
    • https://cdn.shopify.com/s/files/1/0437/6693/9799/files/fifisamob.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/79168351113.pdf
    • https://cdn.shopify.com/s/files/1/0438/2900/2390/files/jorakuxopot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/new_hire_reporting_florida.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/95876164267.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24413790208.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/33733229151.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/27298443303.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/nabimositefub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/22335129634.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_off00005afd.bin
634eaafe51df078eb44dc757cfd2e49e3d66fb92fa0716b01b105eaf7fd0a332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFD 4512 bytes
font_01_sfnt_off00006a56.bin
7c6dad13be237b974eda1cc7aa04be992179f2edc12a913c014f5d951e9b0fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 10416 bytes

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