Malicious PDF — malware analysis report

Static analysis result for SHA-256 767ebb22084fbaec…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 07:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b7f8d405dfc4a9de787cc90ab4d1eb SHA-1: 270e769fabc463c0cbf7fa1fe961890265078e59 SHA-256: 767ebb22084fbaec68db43e4a02492a7911e708195286b080c53ebe3c224b7b7
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 shopify.com domains that host PDF files, creating a link farm. One critical heuristic firing indicates a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body is heavily obfuscated and contains what appears to be a URL, further supporting the malicious redirection attempt.

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=8051+addressing+modes+pdf
    • http://files.apco-florida.org/uploads/1/3/1/0/131069897/519fc2ed4.pdf
    • http://files.letsbounceaustin.com/uploads/1/3/1/4/131438490/7fc6525.pdf
    • http://files.nasiiclothingstore.com/uploads/1/3/0/8/130873983/3256033.pdf
    • http://files.harmonymusicacademytx.com/uploads/1/3/0/7/130739621/3455415.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0386/files/kubatab.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/pirova.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/96236930986.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/dawn_stone_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/23647885116.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/difodel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/bilupudibiderekut.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/18747227360.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/15871887594.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/gabunuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/unity_simplex_noise.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/30369195434.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/nusususidiwisixagutorawo.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_off0000657e.bin
836a4c4b9df44c7cf76b584f352a45442a052eaee095367dd083757ae3e66ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5744 bytes
font_01_sfnt_off00007900.bin
3701ec85658cf0354855b185e2ec237333f008e2ad5f297c79521dee5026bf1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7900 10152 bytes

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