Malicious PDF — malware analysis report

Static analysis result for SHA-256 e348b2a330b3323d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-01 13:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68dde9b9c84a556f06834a62b22c81c8 SHA-1: 325697889c72c54db2967e1ff460d35cc8eaa73f SHA-256: e348b2a330b3323db082d78024c05d401f898530a23fbb8e6048e993131b5bf1
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body mentions 'Discord overlay in game', suggesting a lure to trick users into clicking the malicious link. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which is likely the first step in a multi-stage attack.

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=discord+overlay+in+game
    • http://files.studio279fitness.com/uploads/1/3/0/7/130738915/serawirajisowaro.pdf
    • http://files.emcoburlington.com/uploads/1/3/1/8/131856757/1bcba8e.pdf
    • http://files.sciencealivefl.org/uploads/1/3/2/8/132814400/dd5749d.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/71982693992.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/degurosubizegopeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/sikexuwusakabunulule.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/69376061992.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/felazozaminas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/68396095593.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/41364437854.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/jagarodutedexatolofurezob.pdf
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/niluvixebiraratixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.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_off00006be3.bin
009b7db5ea7234c670475889563362d2337cbe5981e27f14e84c944173251cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE3 5420 bytes
font_01_sfnt_off00007e55.bin
4ab2a228c09add37fe7fcad80cc10d1f00fab52892f21d4489e3acd665c7be16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E55 10260 bytes

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