Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbbda27d0b6ef8d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-19 01:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8ea79244a49fec60ace399e9958b15 SHA-1: 3f32e5ca42576a070246c130f6844d9ee722c966 SHA-256: efbbda27d0b6ef8d9cc668afa661abd1504d3a6ce32ffb00ebed3114a211a10c
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same search query as the redirector URL, suggesting a lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify-hosted PDFs, indicating a link farm used for SEO poisoning or to distribute malicious content.

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.cc/pify?keyword=utorrent+suddenly+slow++speed
    • http://files.mindgymonline.com/uploads/1/3/2/3/132303315/6027195.pdf
    • https://cdn.shopify.com/s/files/1/0431/3569/7063/files/dagarunabinewinurix.pdf
    • https://cdn.shopify.com/s/files/1/0428/8633/2575/files/mabag.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2966/files/20415750746.pdf
    • https://cdn.shopify.com/s/files/1/0431/6076/4576/files/nugelabanef.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/97726489357.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/amcon_act.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/13352990512.pdf
    • https://cdn.shopify.com/s/files/1/0446/9332/3930/files/baeyer_villiger_oxidation.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/byomkesh_bakshi_free_download.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_off000060e1.bin
e32e307577805be04ed9206cf4f049a33bfcf9a61cd084391d6cd6c47f6b857d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E1 4928 bytes
font_01_sfnt_off000071c2.bin
5e8cb8aa6075257b853a1641cdb324c3972d9e827684f7b3ba06f47dd0ca27d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 10684 bytes
font_02_sfnt_off00009693.bin
ad7d4f53ebbeda7878daa9d3ee0c7e7bd9fb5f2a2298dcd23b9b34a2dbcc090b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9693 16104 bytes

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