Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bbddc27758a20b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 14:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8baaef7c1ed4816512f3865923ba8583 SHA-1: 05cb85389ca563b6adf5d8e88588ce474b7853cc SHA-256: b0bbddc27758a20b25d6d814c5b27972b15fcd1864238dcebf487b48f65a47ad
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which in turn points to a large number of PDF files hosted on Shopify. This indicates a link farm, likely for SEO manipulation or to distribute further malicious content. The presence of the redirector URL and the sheer volume of linked PDFs suggest a malicious intent to drive traffic or distribute malware.

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=horse+racing+hack+game
    • http://files.4thoughtpsychology.com/uploads/1/3/1/6/131606094/lumakati-jitogasasu-bilewivazukokef.pdf
    • http://files.midatlanticmotionpictures.com/uploads/1/3/2/7/132712235/budofogusaton_samupabiwopu_nutoguratume.pdf
    • http://files.royaltyhrtdco.com/uploads/1/3/0/9/130968943/sefemixunaviki-mesixedifos-zerepako-linonu.pdf
    • http://mewedoza.beatricekwok.com/uploads/1/3/2/7/132740478/kumixomiwijade.pdf
    • http://files.foresideandalusianstud.com/uploads/1/3/0/9/130969740/4120769.pdf
    • https://cdn.shopify.com/s/files/1/0436/5660/9957/files/because_beatles_free_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/nevadat.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/91634081994.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/gavuvugujabixukujivujif.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/10781640579.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/9063707391.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/robuxinega.pdf
    • https://cdn.shopify.com/s/files/1/0436/9547/2793/files/an_etymological_dictionary_of_the_latin_language.pdf
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/plus_or_minus_alt_code.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_off00005eb0.bin
ac115d0a87820d74c8b8d3641477c545baef183e3fc43b86b12ae5c1ff589ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5208 bytes
font_01_sfnt_off00007037.bin
abb1b1467972338935c864fc8f2141cad0869e920f6a8291f4cfeed40bfea63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 10152 bytes

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