Malicious PDF — malware analysis report

Static analysis result for SHA-256 19de43eea2a43fc3…

MALICIOUS

PDF

53.0 KB Created: 2020-08-14 05:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0cc7691684687af8992eaf028260ba SHA-1: 44ad802688fa21a875edcc4ceeb0c56e7b97e8e7 SHA-256: 19de43eea2a43fc337ffd0a9cac05f733a0a558b1924bf61077a4cf7dd57a809
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, pointing to 'https://ttraff.ru/pify?keyword=sherlock+holmes+book+series+pdf'. This URL is presented within the document body, disguised as a search result for a book series. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The primary malicious URL likely serves to redirect the user to a further malicious destination.

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.ru/pify?keyword=sherlock+holmes+book+series+pdf
    • http://files.ldupholsterymaui.com/uploads/1/3/1/0/131069886/9036187a97bae7.pdf
    • http://palufadek.soleiragreen.com/uploads/1/3/1/4/131437145/gidusopijusagabekav.pdf
    • http://files.buildingleadersforsuccess.com/uploads/1/3/2/3/132303235/5f92783.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/77004861914.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/agenda_2020_objetivos.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/rofutowev.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/segosunosepitebupoke.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/pemefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/24324878288.pdf
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/67446461918.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/90962659991.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/bovuvugabepofalovu.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/amharic_alphabet_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/zuxirowe.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_off000092e2.bin
73093c4509ea53e0679a041a251bfc08f381d835f284f56edf5768c9407e4e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92E2 5492 bytes
font_01_sfnt_off0000a563.bin
d328627db24c4f6010a2c286f3f90776d5c7ac24d3111e193c2abcacc819064b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA563 9976 bytes

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