Malicious PDF — malware analysis report

Static analysis result for SHA-256 496618269c809c56…

MALICIOUS

PDF

46.0 KB Created: 2020-08-21 23:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f43b88cddaab2f329523a38212d6bd85 SHA-1: f55a0405e26769c28f6a9a7e8cd5b8c2fdd5d763 SHA-256: 496618269c809c56bed265a42e4afdaf41f3e9cef091f6675af91ab447b76006
128 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 pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify-hosted PDFs, one of which is also identified as a potential download lure. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, suggesting a social engineering attempt to trick the user into clicking the malicious link. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=subject+pronouns+practice+worksheets
    • http://wamixig.balletfolkloriconwi.com/uploads/1/3/1/3/131380771/xiwoguxarodewilezuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/24454994473.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/punjab_gazetted_holidays_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/autoradiography_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/wondershare_editor_3._9._11._9.pdf
    • https://cdn.shopify.com/s/files/1/0440/6358/8502/files/9684413889.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/bomarotiguwus.pdf
    • https://cdn.shopify.com/s/files/1/0463/3034/7675/files/vemefiwegikikuvoxovifubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/kabakup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a2.bin
205445cd9d9391e6f8532983023a601410acfdc222d6965dccd43afb67732b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 5344 bytes
font_01_sfnt_off000074d1.bin
b6affb12bae2cb1ba31301b96c7180977bc2f374f356ea0414c04eb648ce5ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D1 12720 bytes
font_02_sfnt_off00009d5c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5C 4324 bytes

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