Malicious PDF — malware analysis report

Static analysis result for SHA-256 91067dd73b927ced…

MALICIOUS

PDF

49.1 KB Created: 2020-07-18 21:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d9df641057ebfc3eb26d18b34762ba3 SHA-1: 690531f0c8d42ce7e8a110ac62d7780a75e010d2 SHA-256: 91067dd73b927cedeb076b2aa11b066a92b8c56074db20f25e20ed56265d0626
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Infecciones de vias urinarias bajas pdf', suggesting a lure to attract users to click on the malicious links. The presence of a large number of external PDF links also indicates a link farm strategy.

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.cc/wb?keyword=infecciones%20de%20vias%20urinarias%20bajas%20pdf
    • http://files.joyfulsoundchoir.org/uploads/1/3/1/3/131398377/09ba6a.pdf
    • http://files.calebmurray.com/uploads/1/3/0/9/130968962/situdafetof_sakod.pdf
    • http://files.therapists4u.com/uploads/1/3/2/7/132710565/980552.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/kulapitokalaret.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/kesufinifaji.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/jimuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdf
    • https://xujonajodezo.files.wordpress.com/2020/07/27699828501.pdf
    • https://gexajibixij.files.wordpress.com/2020/07/53412767764.pdf
    • https://lopekaso.files.wordpress.com/2020/06/gitilidurozuvu.pdf
    • https://tadawukisag.files.wordpress.com/2020/07/71683627357.pdf
    • https://murekiw.files.wordpress.com/2020/06/jizuvafukobazunutaravi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/81841554150.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/fuwirudekagebutazino.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0352/files/zofofakepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/padunudowobapidefetes.pdf
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/xizupotijufizepuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/wowipoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/tolen.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/mezosufij.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_off000082d1.bin
0e8b0326acf738cf90dee26e15590589aaef11849aa7a9bec79d0e8b294a4443
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 5132 bytes
font_01_sfnt_off00009449.bin
5a71a918b1c492791fe6da0bb763e80a22bd28bd59b0bbe5a91a532e961dccf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9449 10020 bytes