Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c57100518578ad…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 16:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dd9e5ea8191c3124d5143131cc29e2 SHA-1: 40460d68e684acae2ce426d654eade2bb75b13fb SHA-256: c5c57100518578ad61414f2f378b25dcc7f9c0e45577a5260764e640cb8543bd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, characteristic of a link farm designed for SEO manipulation or traffic redirection. One of the primary embedded links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=funny+answer+to+are+you+ready
    • http://poduber.frelardtamales.com/uploads/1/3/0/7/130776208/9370037.pdf
    • http://kijogon.socalroofingpros.net/uploads/1/3/2/7/132740494/6ae91d.pdf
    • http://vatuge.heathermakesadifference.org/uploads/1/3/0/8/130874284/sozorufazuwojetamute.pdf
    • http://files.officecondoskaty.com/uploads/1/3/1/3/131379832/851bc7bddb6af8.pdf
    • http://jinuxon.twelvepaths.com/uploads/1/3/1/1/131163599/xusijid.pdf
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/xofemesixijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/50095464129.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/surone.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/nojoguzotow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/best_open_source_reader_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/watch_47_ronan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/83303407036.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.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_off00006fa6.bin
f47dfcde245ab0851f1e0efa05628d29b430dbb342b4b586ddb5e7e8bf7a6fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 4936 bytes
font_01_sfnt_off00008093.bin
780f6d2afd92b6ac3dc6e05a2679652cab9fa018ad5192d00e3054e6b889a8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8093 10644 bytes

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