Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff412a14de8399c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 11:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f9cebb471e35804c3fc540431e058fe SHA-1: 20a5afc58931b779e7121ab9e49f4da92a2c117c SHA-256: 7ff412a14de8399c128108e355c332b444062fbb197866392c91c1952fd996b5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=linkin+park+crawling+in+my+skin', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, some of which host PDF files. This suggests a campaign to drive traffic to malicious sites through a network of linked documents.

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/pify?keyword=linkin+park+crawling+in+my+skin
    • http://files.alkalinerainforestherbs.com/uploads/1/3/1/4/131438190/runojot.pdf
    • http://files.sjamediaarts.com/uploads/1/3/1/4/131454383/cf3000d.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/liludesukibuxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3786/files/nuvudupinadivomuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/posemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4544/6044/files/11422963726.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/gepazanabesituson.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/37247792337.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/74873257639.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/80873265215.pdf
    • https://cdn.shopify.com/s/files/1/0440/0339/3694/files/stigma_definition_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/convert_excel_to_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.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_off00006374.bin
35ac197d0be068aa99372b311468506f26932c05ddd6a3b2ae565b549915795d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 5452 bytes
font_01_sfnt_off000075fa.bin
d4aa2e2ee4cc81388f5720fbe2389d7e0e0dd86028424b69fd7288b4fec5c585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 10884 bytes

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