Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e62e1276c60cc8a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-29 05:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa47f1fad7c1868ab55f58ac693d1eaf SHA-1: 9c1d411995c5c2f6b72f9a36fba98bceee22d369 SHA-256: 2e62e1276c60cc8aa33db14f9e03c5ce6066b4908a17793605a59ad2dcaeeaf1
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to a link farm, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Java 32 bit windows 7 offline' and the URL https://ttraff.com/wix?keyword=java++32+bit+windows+7+offline, suggesting a lure to download potentially malicious software or engage in phishing. The ML classifier also strongly flagged this PDF as malicious.

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=java++32+bit+windows+7+offline
    • https://static.usrfiles.com/ugd/b8c837_b6c06453e1624218908cac67efd7fcb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f04ff70ac2c7404db8eb1046660cbc7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_07afa77f3e634e66b134aafe6a3cc6c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0827ac60d8f445adb3d7860bebf65dfd.pdf
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/lesson_plan_in_filipino.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/eldoret_weather_underground.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b2a078d481439b9b22634ee2f252bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_cec769a20d4b4e14ac8439ac311efde1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d1ed76fca7e4ad2a73be0d247009277.pdf
    • https://static.usrfiles.com/ugd/b8c837_b469bbfbb92b47b990690137d1cb885f.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_off00006970.bin
5d8e3911f2c3b1cee20d0dc3f91c82abde54ec7603a0b674825f5e560e095ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 5460 bytes
font_01_sfnt_off00007c2f.bin
4183fb4aa7c9b03babc3b2c80db12f9a162629c0b075c98a1a25f473831abf72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 15316 bytes

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