Malicious PDF — malware analysis report

Static analysis result for SHA-256 c652f280abfe48a0…

MALICIOUS

PDF

68.9 KB Created: 2020-08-19 06:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eb4eb0c04313f0d4c4242bea7c0aa4b SHA-1: 8a9cef5390807741410a382a36ffa2f2f485b952 SHA-256: c652f280abfe48a0b4fb06b0246604dada045e56578c478c36cee039ea64fa1e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary redirector URL being `https://ttraff.ru/pify?keyword=angular+format+currency+pipe`. This indicates a likely attempt to lure users to malicious content or a phishing site. The heuristic `PDF_MALICIOUS_REDIRECTOR_LINK` confirms the malicious nature of at least one of the redirector URLs. The `PDF_SEO_LINK_FARM` heuristic further supports the idea that the document is designed to host a large number of external links, many of which point to benign Shopify URLs but are likely part of a larger link farm strategy.

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=angular+format+currency+pipe
    • http://rudur.apollovacations.com/uploads/1/3/0/8/130874493/3d68e2.pdf
    • http://files.hanoverbrass.com/uploads/1/3/0/7/130775712/8283255.pdf
    • http://gapedokal.helenaeloisephotography.com/uploads/1/3/1/8/131871825/sodol.pdf
    • http://files.2rpace.com/uploads/1/3/1/4/131406806/1357593.pdf
    • https://cdn.shopify.com/s/files/1/0447/1311/5802/files/administracion_de_recursos_humanos_chiavenato_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/59082830734.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6208/files/longman_writer_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/fizalatoxero.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/noxazebebut.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1871/files/58002922085.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/wubexugodamumijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/1839892631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/6725067980.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2711/files/act_ffxiv_settings.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080c7.bin
2098edb238b680226487b28604395d06fde504cfebebf10cf7e60e192b5886d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 5248 bytes
font_01_sfnt_off00009290.bin
bab409afe3c8865ebc5a9c997a7c4378b4f92ef5165b900e12cd9fba1f26d62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 3852 bytes
font_02_sfnt_off00009e88.bin
c949087b9f50a08f72086d9c3eda942c811905b9aa4bbe55f269c7cb7959b53f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E88 3980 bytes
font_03_sfnt_off0000aa74.bin
24d1c4523cda6839b1e66e916911f13ff0014407cda70c0bd4b73822473aecc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA74 1704 bytes
font_04_sfnt_off0000b30f.bin
06a7782f3b5ecc61605ecedf7ef4a281b8e32b29a13e8a257b59cc525e12f359		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB30F 18728 bytes
font_05_sfnt_off0000ed6e.bin
5a0e2860132252edac9062bef0e8fd634902f2484e13818d11562151ce4f5454		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 16632 bytes

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