Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de72a5989246ee4…

MALICIOUS

PDF

39.5 KB Created: 2020-09-08 07:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f20a5d85c8e1f977ae307a024b8a97 SHA-1: aed6bb776f5c891b275df3c23c8c92c6c492b285 SHA-256: 3de72a5989246ee4ec87670ad3130f16fecdc8d38dbb4f0859b3b6f87b23ef2a
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure for installing browser-related software. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a social engineering attempt to trick the user into downloading further malicious content.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.link/wix?keyword=chrome+browser+for+pc+32+bit
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/97900243091.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/free_car_maintenance_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/asuran_tamil_movie_in_isaimini.pdf
    • https://static.usrfiles.com/ugd/011e4b_892b139391d84960a09042a4906f933c.pdf
    • https://static.usrfiles.com/ugd/30ea26_bbd1d57912e84c7cb81db66164d1fec9.pdf
    • https://static.usrfiles.com/ugd/c162b3_4c8f1f78475d4938a610fcf8ab369a95.pdf
    • https://static.usrfiles.com/ugd/857e61_e938d114ad2c4cf2b699f54ee1a82564.pdf
    • https://static.usrfiles.com/ugd/f9fac6_1e3931a1932c4a8d9c91ec241bfa2202.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/81998412928.pdf
    • https://cdn.shopify.com/s/files/1/0459/5659/5871/files/59578988477.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/zz_top_sharp_dressed_man_tab.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_off00005cc6.bin
22fb7ac14cc39d3cc0389dbf6f8b0cc615c1f08b1262ba1ccf3216111eec864a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC6 5448 bytes
font_01_sfnt_off00006f33.bin
e5fabe788daa39201116c0edcf798d43c7f8c536890abfa90d13693804237aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 10100 bytes

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