Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccd64b03c6f3f7e…

MALICIOUS

PDF

50.7 KB Created: 2020-07-15 07:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d76e93bea8d5d64da4df1388ae64cfc SHA-1: da7db52d8041f0d2cf94154bb6e617c62958de4b SHA-256: fccd64b03c6f3f7ef74e81c1f538423e590c2619b042a134abe423760c8e3fce
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Tetralogy of fallot in adults pdf', suggesting a lure for SEO poisoning. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/wb?keyword=tetralogy%20of%20fallot%20in%20adults%20pdf
    • http://files.raidsb.com/uploads/1/3/1/3/131379406/givetagubivumi-xepesizexatez.pdf
    • http://files.indianabln.org/uploads/1/3/0/9/130969304/989691.pdf
    • http://files.grandmashousellc.com/uploads/1/3/2/6/132681671/bixewef_goperas.pdf
    • http://files.raidsb.com/uploads/1/3/1/3/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/vitolunakexumuwozafal.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/dewejalowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/senulagevitison.pdf
    • https://bisapabak.files.wordpress.com/2020/06/fijilogofuwekefedu.pdf
    • https://zelagaxupimo.files.wordpress.com/2020/06/larabudafumojokelotaxe.pdf
    • https://limalido.files.wordpress.com/2020/06/63029636135.pdf
    • https://wuxegura685470280.files.wordpress.com/2020/06/sinojeno.pdf
    • https://nifubija.files.wordpress.com/2020/07/ganozovowinerikisumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/49498331847.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/44783904413.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/vudasukun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/2570019629.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/lenifenurumobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuvororixepexovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/78155608726.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.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_off000080e6.bin
c42f821e44a4a0775a6d52dece544848dc620c2c48d60e9939ee72be25ec1f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E6 5144 bytes
font_01_sfnt_off0000927b.bin
5762d77f4d5348c1baaa7859b44cb2ffe655e3d15f36d2d872b8c5191808beb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x927B 13284 bytes

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