Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e3b31a9a4f5107…

MALICIOUS

PDF

55.5 KB Created: 2020-08-29 09:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66dfe133bffe2657324e231349d2ddc6 SHA-1: 87c49e94ce17acd0878357e4d305d25eff6dd574 SHA-256: a1e3b31a9a4f5107480cbba5edf03ad17a76081d5b10b06f1eb415728ee7efa1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=does+overclocking+cpu+void+warranty'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt to increase visibility of the 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.cc/wix?keyword=does+overclocking+cpu+void+warranty
    • https://static.usrfiles.com/ugd/b8c837_161696ee43f742afbb6d157ac636d6c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8657dfc8d9494d70855fa76bb9c1a0e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_db6e2c4000844511928af7324fb36554.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f50a5e426af48a5a32e29de52799ca1.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1351/files/guxaremo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/agni_devi_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/dimibikilepalemokoluzev.pdf
    • https://cdn.shopify.com/s/files/1/0450/3171/9070/files/bitevedumimegerakidixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/40797091263.pdf
    • https://cdn.shopify.com/s/files/1/0464/0587/7915/files/jowuxanifunimobo.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc3e5146f5d47b9bd1c8682daaed1fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a9e319c0919441899b43172727d5cb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba3326000c4c431b9463f4676d64e347.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd470b8877947c292e1a654f1a01b2e.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/
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098c7.bin
f895c013369bb7e93ad8aca5d89e921fafbb490cb0da3ea9dd425f46ed4dc040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C7 5560 bytes
font_01_sfnt_off0000abe1.bin
c9ccd85139f47b3d18a5425d9ab6751e980aecb6968094cf4b0acedc2115b5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABE1 10772 bytes

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