Malicious PDF — malware analysis report

Static analysis result for SHA-256 303d6d071fbe333b…

MALICIOUS

PDF

54.2 KB Created: 2020-08-28 14:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673a7120fbba670c5a1096f1298e9f31 SHA-1: 54571cbb893533a72d25d72f55dbd0abe674e1bf SHA-256: 303d6d071fbe333ba6d3b99d04e1d2d4ce02d55b24c131cc9d4b14cf90b3cd0f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment 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 the embedded links, https://ttraff.com/pify?keyword=nokia+5310+xpressmusic, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a Nokia phone and the redirector URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=nokia+5310+xpressmusic
    • http://vasonexu.jessethomascomics.com/uploads/1/3/2/6/132695839/dokaj.pdf
    • http://files.alternativeathletics.com/uploads/1/3/1/4/131406785/20a32fbb8.pdf
    • http://pusirim.cbarealtygroup.com/uploads/1/3/2/6/132682076/refalagajo-mivapiwepazu-denezuxusu-rasavujozafuza.pdf
    • http://files.fieldhouseantiques.com/uploads/1/3/1/0/131070434/6e1ba44ade166b.pdf
    • https://cdn.shopify.com/s/files/1/0463/9073/9099/files/via_karaoke_digital_mixer_service.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/rupomofidijofesir.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/fojid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/xerufibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/97961736335.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/74771743070.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/73738508879.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/jigotenutatagivijude.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/woxiluponiwovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/vawezaferugez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/gisodogalelejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8223/files/bironivisemupajix.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_off00009367.bin
19601bd5526d00e788a726e7c1f6bab8f1465efda5f894c397acc756f5893371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9367 5632 bytes
font_01_sfnt_off0000a67d.bin
9652dc120fe68426c9089f14fc118465d90ac3476fc48524421c9882c8ca95b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67D 10880 bytes

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