Malicious PDF — malware analysis report

Static analysis result for SHA-256 a098e91aa70178dc…

MALICIOUS

PDF

52.4 KB Created: 2020-09-01 07:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c13b56ff3846b981d8ff945101ce7c2d SHA-1: ad42caedaabf33631cc854877117fec495da2dfc SHA-256: a098e91aa70178dc7dbb83b9691559e0964326f806bc97e3e720d9f373e11751
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a keyword related to beauty products. The PDF also contains a large number of external links, many of which point to static.usrfiles.com, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. 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.cc/wix?keyword=whitening+facial+mask+sheets
    • https://static.usrfiles.com/ugd/4d6844_5f390771d73b49acbe70fd1f5fb57762.pdf
    • https://static.usrfiles.com/ugd/b8c837_de221f358af14cefb7bdd19a92485e94.pdf
    • https://static.usrfiles.com/ugd/432b07_90f977da24564749a1bdd9af22a3d274.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/orders_of_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/34700269928.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/lotakirekajogamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/48085238943.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/28615114780.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/healthcare_administration_and_management.pdf
    • https://static.usrfiles.com/ugd/50de67_0b429bb1d09740668038938971eb43a9.pdf
    • https://static.usrfiles.com/ugd/784815_a91c2b87176248a49876f787a9458d5d.pdf
    • https://static.usrfiles.com/ugd/71fd01_9b7b09c130b24eec8e143a0742c7b9ac.pdf
    • https://static.usrfiles.com/ugd/10a4aa_bc0cc3b585e24b3b9751be59e1802f18.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081b1.bin
3dcfd9cd003b32c0cdfbd742b875409a69e7c194a3b462be68eb7362c3205453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B1 4956 bytes
font_01_sfnt_off00009267.bin
51ac1af4dc1bcb5c41d34730c1bfb5f5a9f8bbe8926ece3978a1851711954849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9267 10488 bytes
font_02_sfnt_off0000b655.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB655 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.