Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21359886e764e1e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-01 13:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8e7ce271fcd7d0d51defc8c8032552 SHA-1: 82c5497066992ead6ec12cf6133a25aa91619a1b SHA-256: e21359886e764e1e0142f3cfb4daa7865927884486fd0d097f881288ad57c1bc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and a reference to a study guide, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs.

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=grey+chinchompa+osrs
    • http://files.sniderthirdgrade.com/uploads/1/3/2/7/132740541/c4da5500d29f68.pdf
    • http://files.michaelarubin.com/uploads/1/3/1/4/131408256/225ec7e0f69.pdf
    • http://files.newsunyoga.co.uk/uploads/1/3/2/7/132740501/kewerigedav.pdf
    • http://files.bringmorehappy.com/uploads/1/3/1/4/131454355/50bca6bb3839ba1.pdf
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/ase_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/jovepozirogaxusopatejaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/fejemebowunarimonulerezuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/41582735723.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/30672502218.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/bedigixulabuwosige.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/cabrio_dryer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/d3_node_js.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/10598550061.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/xuborisejajafewagerelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/fubituvewos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0352/files/27849267121.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5069/files/14384924971.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/13145648663.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_off00006974.bin
ea688b079948cef0f4999b6d383605a4940fcdd178faaeb02c2a54f6c1d87fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 5276 bytes
font_01_sfnt_off00007b44.bin
48cc5504fda751db08930bba7a3a54fd1beebe09403080d16e88de1afaeaa7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 10420 bytes

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