Malicious PDF — malware analysis report

Static analysis result for SHA-256 899766cf49bdbb2c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 22:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52afab555f9d67b23b1f7810e567083d SHA-1: 45a24be4bf93c95d1fa571ccf2852cfa8799fd0d SHA-256: 899766cf49bdbb2c465d483f4e484860a3d84f9da0423867e98dd181833a8e06
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 links, many of which point to a link farm hosted on static.usrfiles.com. One of these links, found in the document body, redirects to ttraff.cc, which is known malicious infrastructure. This suggests the document is designed to redirect users to malicious sites under the guise of providing a diet plan.

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/wix?keyword=dr+nowzaradan+diet+plan+1200+calories+pdf
    • https://static.usrfiles.com/ugd/2f8cea_e06a5970d6594169abd01c588695fc9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e92f99d0184713afe8be59e0e5d453.pdf
    • https://static.usrfiles.com/ugd/2c608b_8a1bd12d5cc740b58b8d8da405cebfcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_33d8c61b388f47fc97ebbf1c00f5c01f.pdf
    • https://static.usrfiles.com/ugd/5ed537_8e848081dbf74a6482c444a9214af92e.pdf
    • https://static.usrfiles.com/ugd/003b86_893e1abc82ac4c6c9163fd050549e33e.pdf
    • https://static.usrfiles.com/ugd/913720_abfe502f193749f5a3c855d36028745e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ab8d2e2da394f6191214d53b1402e32.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/79438283809.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/sociolinguistics_peter_trudgill.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/vikowikipowimupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/vokutudabig.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8078/files/67945129313.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0913/files/83850950213.pdf
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/22376035993.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/27016425427.pdf
    • https://cdn.shopify.com/s/files/1/0441/4432/8856/files/xuvukelowiditotadibiseguf.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_off000070a4.bin
ba77b2fd26b28bb0a2a9e893e2898872ceecafd46179551010d8a7d259184bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A4 5616 bytes
font_01_sfnt_off000083f2.bin
f6cd1bd46ef6f87bf8cf6c509fe8cb058e5c36036baf55a25572a4f05119389a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 10164 bytes

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