Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d6fe4d9396e051…

MALICIOUS

PDF

37.6 KB Created: 2020-08-31 09:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69f3043bc460d50293c8a0f77608a7cc SHA-1: 5b5462614c45c060be1285b1715e1dc8bbfed9f0 SHA-256: 44d6fe4d9396e051746bf34f95da1a4de478115ab7c08896073589549cc2fc8b
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=advanced+bread+and+pastry+free+downl', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'advanced bread and pastry free download', suggesting a lure to entice users to click the malicious link. The presence of a link farm and a malicious redirector indicates an attempt to lead users to malicious content.

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/wix?keyword=advanced+bread+and+pastry+free+downl
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/ca_foundation_accounting_book_do.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/equaes_logaritmicas_exercicios_resolvidos_doc.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/sujet_brevet_2020_amerique_du_nord.pdf
    • https://cdn.shopify.com/s/files/1/0437/1195/5098/files/76007594507.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4893/files/79615462317.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/melojewojevojalov.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/15499859824.pdf
    • https://static.usrfiles.com/ugd/565485_35ebfb8820e740b1a7409b3de3c1a8f2.pdf
    • https://static.usrfiles.com/ugd/b85eb0_c8c66dd506c745d0a9b38d9dde763749.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5ee06e698d144a9bf690d5043493013.pdf
    • https://static.usrfiles.com/ugd/65b209_b21a026ab0de48f9b7cfa61c55142777.pdf
    • https://static.usrfiles.com/ugd/a18aa6_d33ba2f7839746298091b2a0b0cdbd27.pdf
    • https://static.usrfiles.com/ugd/b8c837_68780f2a0bd846f2930ccf35a77f2cf1.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_off000051db.bin
aff567b4f31e2f0ef5a8792c0352688e7162996b99728016aa5c6c68069b285d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DB 5532 bytes
font_01_sfnt_off000064cb.bin
4ca630b31d9f2b7afaef4a4372559f5514333543eefc48a30189d4a75838eec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 11276 bytes

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