Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab219b4eda2cbbb…

MALICIOUS

PDF

38.4 KB Created: 2020-08-06 23:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e92f4da6c1cd73d216d83d71701ab7 SHA-1: 097db1768cb406350908759a3f6fac50144a72b9 SHA-256: 4ab219b4eda2cbbb70ab740ec7267cda25162b25f2eb4dc0c0dea21ff977ea43
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector and several benign-looking URLs hosted on Shopify, likely to appear legitimate. The heuristic firings indicate the PDF is designed as a link farm and redirects to malicious infrastructure.

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.ru/pify?keyword=active+passive+voice+exercises+all+tenses+pdf
    • http://files.ezkennel.com/uploads/1/3/1/3/131381363/lukiwibezuminulebux.pdf
    • http://files.kingdomofchristrealities.org/uploads/1/3/1/4/131455621/rurefesuvawizi_widarudu_radofutawodob.pdf
    • http://files.tagis.pt/uploads/1/3/1/3/131382346/fofolexenad-vijikuwuzapita-pibevimerobiwaf-degume.pdf
    • http://files.dmparanormal.com/uploads/1/3/0/7/130739202/3627655.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/61121295968.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/vujeluxokozerisemazew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/6854652843.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/pigovufozavopabatozosani.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2243/files/kasoxiponogisujitibafo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/21546029586.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/tabofekiboju.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/56291775985.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8526/files/sexy_love_poems.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/abnormal_uterine_bleeding_figo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/niraguxadaguwatuk.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_off0000592e.bin
19c66a55ffd8de94729d4ba4c19e8591463719372c14960f43b6535575458ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592E 5268 bytes
font_01_sfnt_off00006b33.bin
8b8de467f1a84f783da3ce3ff48c690f08c94a4362931dbff4334b5c47a2dffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B33 9784 bytes

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