Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b77634f29bb3ec…

MALICIOUS

PDF

33.0 KB Created: 2020-09-13 06:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ab2a407f5a01bd4cdd064f4d578a76 SHA-1: 09db4a6d4857156b9e2bf3ad7d80725adc6d7dcc SHA-256: e9b77634f29bb3ec23cbb3213536420c898737bf996b59714bb0fea8c1ece505
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=the+ultimate+guide+to+the+presidents+hail+to+the+chief+worksheet', is designed to lead users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, suggesting an attempt to manipulate search engine results or distribute content. The presence of multiple Shopify links, while some are confirmed benign, does not negate the malicious intent indicated by the primary redirector. No scripts were extracted from this sample.

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.link/wix?keyword=the+ultimate+guide+to+the+presidents+hail+to+the+chief+worksheet
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/funny_answers_to_how_high_are_you.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/jiwuxujuwatewezasanovifat.pdf
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/examples_of_directional_and_nondirectional_hypothesis.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/doomguy_minecraft_skin.pdf
    • https://static.usrfiles.com/ugd/e8e253_ba8aed51cf404f01915659ebb01b17fb.pdf
    • https://static.usrfiles.com/ugd/964009_d718517adb7949789110771d26ab3954.pdf
    • https://static.usrfiles.com/ugd/e5412a_75c596aa2c9442ff9e757130fcd86461.pdf
    • https://static.usrfiles.com/ugd/de3d83_ab2044d13e7645cb9a93d8d472617346.pdf
    • https://static.usrfiles.com/ugd/b42fd6_c0f893469785466f8322f6b957008418.pdf
    • https://static.usrfiles.com/ugd/e33828_f5417eceac994fe895c5fda59793e8ba.pdf
    • https://static.usrfiles.com/ugd/185811_5bebcf0a847d43369bdb7ff76651f8a5.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_off000042f8.bin
9f72f6435d148af5c5dabed5a0bfec5218f25a21fd94c11e2192923498994497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F8 5672 bytes
font_01_sfnt_off0000562a.bin
a9dee9a9b69f85af34065ad566a42b2635e424b77d21133b84374f648e231826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x562A 9684 bytes

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