Malicious PDF — malware analysis report

Static analysis result for SHA-256 acebb1d2419620d7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-29 23:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d61e44a433282de5fbdee18039a1216 SHA-1: b5fafec87f0f0916b4e9429ef4e0d8ea2bd7f084 SHA-256: acebb1d2419620d7d9f3239385c7163019879f7d54187b55befd0eff11ed5faa
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO manipulation. One of the primary links, however, directs to a known malicious redirector at 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure under the guise of providing math problem solutions.

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.me/wix?keyword=problemas+matematicos+con+numeros+enteros+resueltos
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/25329035531.pdf
    • https://cdn.shopify.com/s/files/1/0462/5278/5813/files/kolokumojefageko.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/39358790159.pdf
    • https://static.usrfiles.com/ugd/b8c837_965c8c0373814048ad8d9eb9b11ac205.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/apprendre_a_ecrire_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/dezitewuvamukajaributatuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/19094974551.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/falagejoxituforewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/gapekuviferi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/4114186832.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/xajugenuxivome.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/pyplot_vertical_line.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/40739988339.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b12.bin
61b643b93a08230bdf0ef5073014a69593ca814764b00229d576f03388b5c190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 4968 bytes
font_01_sfnt_off00006bd3.bin
ed010c93b49e12e6b43a2988ae3442c38284fdf00e13daa888658a14adbd97c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 10816 bytes
font_02_sfnt_off00008eb4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 4324 bytes

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