Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9ae8baa69f0043…

MALICIOUS

PDF

45.4 KB Created: 2020-07-29 17:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c182c9e6b592f19a08ad382dc206f83 SHA-1: ed008c22ceab6ed59025b48400d93420f68837d9 SHA-256: 4f9ae8baa69f00435a342c747c295f02dbf6eebab61a291c31ade82c5513cd71
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, designed to obscure the ultimate destination. One of the primary links leads to a known malicious redirector, ttraff.cc, which is likely used to deliver further malicious content or phishing pages. The document body, though heavily obfuscated, contains references to 'clear muscle workout pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent.

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=clear+muscle+workout+pdf
    • http://files.sentinelhealthshield.com/uploads/1/3/0/8/130813528/pemerokemomodofu.pdf
    • http://files.carringtonandfinch.com/uploads/1/3/1/1/131163684/7268604.pdf
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/xopedimud.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/xopabipunaxubobone.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2165/files/39490173766.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/pekokafebubumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/tevasitijilevumisatilifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/dujag.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/tusipunabiwaserem.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/34325142940.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/zimiwusarodagezi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/jonibakewajixamun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/tuzorejajogivovezutakeveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/dunupeterupasovus.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/
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/tevasitijilevumisatili

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007437.bin
3d9331f55e4ea945bf38c1068d0f034641cae9afdd916dc6c48465953b0b313e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7437 5208 bytes
font_01_sfnt_off0000860e.bin
3af896890c8b680068035605c02aff91b0dc2adcc8c90bc74f073672a7aa06c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 10148 bytes

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