Malicious PDF — malware analysis report

Static analysis result for SHA-256 235ebbe0e9e0733a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 06:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 417d76651c8bee22b21bd9fc5caa9088 SHA-1: 9262e34b3250147064ea8d875e13c5910507a98b SHA-256: 235ebbe0e9e0733a67b4c839bf48fe7be275af4b9473faa7716b1b2cdf8f0361
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the text 'Former accountant general of the federation' and the URL that triggered the malicious redirector heuristic, suggesting a lure to trick users into clicking through the link farm.

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/pify?keyword=former+accountant+general+of+the+federation
    • http://files.bohemianstudios.net/uploads/1/3/0/7/130739202/zawumos.pdf
    • http://files.brecksvillecogop.org/uploads/1/3/0/7/130775490/sugumizoj_nojetemogitix_jodewato_dozumafedob.pdf
    • http://jaxofubu.eriniwata.com/uploads/1/3/1/4/131453284/nofivuxuxasigaf.pdf
    • http://files.elysianbotanica.org/uploads/1/3/2/6/132681392/wojaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/jitajakumetine.pdf
    • https://cdn.shopify.com/s/files/1/0439/0138/6920/files/gaboxowol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/5290096284.pdf
    • https://cdn.shopify.com/s/files/1/0452/2593/5005/files/nifigunakuperazetuxupinip.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/kopaxebavudimekese.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/25364865142.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9017/files/dabizuwokapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/2936221180.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/33245913907.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/96473761002.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/didarase.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/31715609663.pdf
    • https://cdn.shopify.com/s/files/1/0438/1877/8781/files/36670152298.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/kadurowaraxis.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_off00005b3f.bin
8646182ce4bb8805d3022ba652e7cf630e336014d231690a6744d19c43c3d15c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3F 5096 bytes
font_01_sfnt_off00006c5c.bin
863585f8dd99b373de19506d3df9579c5134360c62048b99e84a80e155717814
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 10124 bytes
font_02_sfnt_off00008ee5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE5 4324 bytes