Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c8b996b7412f3…

MALICIOUS

PDF

53.6 KB Created: 2020-07-25 21:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66858477122ec5536757f923804dd035 SHA-1: fdb7cd5300947ee1f7a109348e16f385ea5358ff SHA-256: d25c8b996b7412f33c5c43f42400141d1fbd610876498d73ff3f1cd3dff35d24
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm with numerous links, many hosted on Shopify, designed to obscure the malicious redirector at ttraff.cc. The document body, though heavily obfuscated, suggests a lure related to "Clima colombiano pdf". The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site. No scripts were extracted, limiting the analysis of further stages.

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/wb?keyword=clima%20colombiano%20pdf
    • http://files.marlonkellyloans.com/uploads/1/3/1/6/131606923/xalomupesulo.pdf
    • http://files.thenarrowtruth.com/uploads/1/3/1/4/131452939/8870118.pdf
    • http://files.mindbodycounselingllc.com/uploads/1/3/1/0/131070485/dufiludodeduji.pdf
    • http://files.socorroboutique.com/uploads/1/3/1/0/131071167/6dbb85b0c583.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/42324192519.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/jelidenugenejalavupogaber.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/sebofokipuzudibilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/61406949388.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/84721832557.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/84412846333.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/doxikek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/visigevibimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/2402027752.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/91877708521.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/xubebiwewuriku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4640/files/11130443867.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/
    • https://cdn.shopify.com/s/files/1/0432/3049/4878

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009022.bin
3be4db89171074a25e6320122ec239da9e07e971dd11d160b357ee1106ca3962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9022 4780 bytes
font_01_sfnt_off0000a031.bin
5c389f3029adfbc33274028c4cd6c1e0b3b22318813c02d84f0ca9ffffc0befe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA031 13228 bytes

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