Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f79c68569b7421…

MALICIOUS

PDF

32.8 KB Created: 2020-08-22 03:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 544fd5c784c5be7ff4558f8b7995a6dd SHA-1: 55fe6f0a1f03d8d9d5cff5f4d482943e13313a4d SHA-256: f2f79c68569b74211e599d541946312a636748e0cde01bcde765763d122c949c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text referencing a 'word quiz template' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify, likely to obscure the primary malicious destination. The primary malicious IOC is the redirector URL.

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/pify?keyword=word+quiz+template+v2.+1+for+moodle
    • http://files.cybersecurityinc.net/uploads/1/3/2/6/132681938/natuwafegaga.pdf
    • http://files.miltonrtrice.com/uploads/1/3/2/8/132816066/pipedujatinusebar.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/45483267721.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/80181515865.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/egomanaco_vi_keeland_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/lukivudab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/pesowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2133/files/aces_high_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/lajowokose.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/2717849214.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/gmail_for_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/zobifidevidukuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0406/files/taxige.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_off00004236.bin
0208fd4266d65df122515229a081c038f653c8c7122d68ba534643d094089b9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4236 5472 bytes
font_01_sfnt_off000054e2.bin
f35c1242fda2ba49036b708b00abd2b3efe7b362742288b499af7ef17fbf9ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E2 9880 bytes

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