Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e8da0e656394e5…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 17:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51795152188cb0aa9783b98c9e8ee807 SHA-1: e509cd7db02e9f806872e766693db134f96d9917 SHA-256: 40e8da0e656394e5fabb397a12e65c7dadc3faad5f0ee3536287c2647142a84f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the same suspicious URL. This suggests the primary purpose of the document is to lure the user to a malicious site. No scripts were extracted, and the family is unknown.

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=gaiam+restore+pressure+point+massager+guide
    • https://static.usrfiles.com/ugd/d54300_efe32e30ff7c46cc9fc07523e638a882.pdf
    • https://static.usrfiles.com/ugd/913720_c213ad419b8b4e389b92b36a6cc518bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_920ece2f56c643e299f179c7d6249eb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d8179d1e34848bc88fe64cc0c54dca9.pdf
    • https://static.usrfiles.com/ugd/74a852_1504d054e65440b28e20f160ffc428eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_99ab475b41a142b8b91bf48faf579473.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b86c16dfe740c0a94601885d5d65a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f9b168beec40f4aba744411290e806.pdf
    • https://cdn.shopify.com/s/files/1/0434/6255/7856/files/mavefaperinigekaxupop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/metformin_associated_lactic_acidosis_criteria.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/winkler_titration_method.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_off00005128.bin
e3875f5dd33b2f376eddc03b447f976a2676600e211df4c35777c9879fde371c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5128 5276 bytes
font_01_sfnt_off00006307.bin
534066ffcedfa457b0f8912a752a9d8356fec7dd43ff56a100edc0b0c4b3fd8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6307 14484 bytes

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