Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93ba2553047b326…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 21:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86767648232b5edd865432326cf37d71 SHA-1: 896f1f545964cda6dea3f1499d3de5b55e8ce4e4 SHA-256: a93ba2553047b326affbb3c4b7d8a81b809e86f8773e7675e97284b846dc4e21
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=estimulacion+temprana+libro+pdf+gratis', which is also listed as an embedded URL. This URL is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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=estimulacion+temprana+libro+pdf+gratis
    • https://static.usrfiles.com/ugd/cb2bed_e24ff8ad35b0454eb274990e7e43370e.pdf
    • https://static.usrfiles.com/ugd/b3bc21_e3749aa6eb6f446fadbf5252c3e6b573.pdf
    • https://static.usrfiles.com/ugd/d94ae5_3b2845eb0399459289161ac99192ff0a.pdf
    • https://static.usrfiles.com/ugd/12f4eb_d7beb408270f46eab8a2be6cbf795211.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3215/files/61590181603.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/7621314957.pdf
    • https://cdn.shopify.com/s/files/1/0434/8349/6600/files/26995346997.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/gumaviduvowafisilitugega.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/belastingdienst_aangifte_loonheffingen_2018_en.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/avent_naturally_express_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/dissertation_acknowledgements_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/tosafive.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/15099040517.pdf
    • https://static.usrfiles.com/ugd/9c43ec_8b6294095d8a4016a6dd08336e2e7690.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcf8ae4208574a229b816d0d778b054c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f78dec1a0373414491daf7d67e769be4.pdf
    • https://static.usrfiles.com/ugd/b8c837_63f5b5e8bde64ac286054fa631610ed4.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_off000068c5.bin
27800bf00447ec58eeaf47f21c2bcd42708153399e0b59b795cb122d55b990c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C5 5572 bytes
font_01_sfnt_off00007b8d.bin
9006a750f7d30d817a5bc5d9c23a7aa0c82c7dd8d629cb2f6f448be1d29c1445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8D 11260 bytes

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