Malicious PDF — malware analysis report

Static analysis result for SHA-256 416da65635013e75…

MALICIOUS

PDF

42.7 KB Created: 2020-08-03 01:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66a8ecde95d34864944f912b771fc332 SHA-1: c3772de7112a34d15ca6554c5332bcee851d71bc SHA-256: 416da65635013e75044ddb2fd405a899388cdc685b9403a4dd80b7c7029b264a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external PDF links suggests a link farm or SEO poisoning attack. The primary malicious URL identified is https://ttraff.ru/pify?keyword=keurig+elite+manual.

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=keurig+elite+manual
    • http://files.swedesteelworks.com/uploads/1/3/2/6/132681901/3061835.pdf
    • http://files.juliaminson.com/uploads/1/3/2/7/132740619/c8f45d9.pdf
    • http://files.cristianamente.org/uploads/1/3/1/4/131438442/6651506.pdf
    • http://files.musicbyspecialarrangement.com/uploads/1/3/1/1/131164440/6083366.pdf
    • http://files.waramaughospitalityco.com/uploads/1/3/1/3/131379477/filizoxij.pdf
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/93771368238.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/kovavok.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/31357748237.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/58294851848.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/28545590854.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/selezagijisexalafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/ligezitexivifaxezokodow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5777/files/bulorefotozuzanipeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/tiwapugexujibemikizoxo.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_off000069d3.bin
93176211b092a5df609d4baa922f62408b80a698b64835077104809819383c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 4796 bytes
font_01_sfnt_off00007a10.bin
c6fdb6da47a4b6159ea80a52e237a5bd7c158645c9e2e75d1b5761ba24c128e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A10 10452 bytes

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