Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc7daeddd97093c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 06:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24799ae2e71fae8509ac59e914c3fff SHA-1: f86ab57827ca8649632d482350de49a46917fdfe SHA-256: 4bc7daeddd97093cc99ec497b59f5218bb98cde0e072b513d23e0147d32d7fd8
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 of which point to a redirector service (ttraff.com). This indicates a link farm attack designed to direct users to malicious content. The ML classifier also 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.com/wix?keyword=bfchickengamers+modlarla+survival
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/alien_shooter_campaign_1_2_3.pdf
    • https://cdn.shopify.com/s/files/1/0439/1138/1147/files/mv_44_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5351/files/59954556415.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/436158224.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/zomowa.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ce7df141ee543ad95be663f69fcede8.pdf
    • https://static.usrfiles.com/ugd/5de1df_087fa9874d6147f786055e1aa56aaa18.pdf
    • https://static.usrfiles.com/ugd/fedf23_892b96388687427db999381da2152fe7.pdf
    • https://cdn.shopify.com/s/files/1/0452/7525/0849/files/toxoplasmosis_signos_y_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/venoruzisifeganevas.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/pinivelibodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/powiri.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/fuerza_y_luz_reporte_de_averias.pdf
    • https://static.usrfiles.com/ugd/0a052f_56f1093982bf40338b6421484be95b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_e61c8e1e8e6e47cab31f9e7e7e6699ba.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_6742940a169e4dd39843730569e67b7e.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_off0000689c.bin
2a5317116b8f3034beac4bd6ae0ff810df21922c1ae6267544e9f1efb50da76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 5608 bytes
font_01_sfnt_off00007b84.bin
7d4d59e1c98f8025ca4507a6493da907f136a4511de5a4ad45d896f3b2d91086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 9900 bytes

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