Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcf80375a2884be…

MALICIOUS

PDF

39.7 KB Created: 2020-08-15 14:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2cd14e5e99df60c2b5e38a0411b04cd SHA-1: d682ab77d537f6c17fbab74bb78fa2da4c04b6a1 SHA-256: 3fcf80375a2884be71c204311bde2baa2e8bb6990bdadf0391ff919c7b628e7f
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as an Excel template. This heuristic, combined with the ML classifier's high confidence, indicates a malicious intent to redirect the user. The document also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document title and a malicious URL.

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.cc/pify?keyword=supply+and+demand+curve+excel+template
    • http://files.biggreenadventuretours.com/uploads/1/3/1/8/131872273/sinudibeveso_jabajumigitinav_xuvibu.pdf
    • http://kativ.mprints.shop/uploads/1/3/0/9/130969488/8829523.pdf
    • http://files.nutritioncapecod.com/uploads/1/3/1/3/131380767/sugis_kobaguzoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2701/2507/files/37110544843.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/pdf_annotator_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/logrolling_government_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/84046089961.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/revivoxixumis.pdf
    • https://cdn.shopify.com/s/files/1/0450/5151/0936/files/bsc_1st_year_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/gezoxigew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/34423221020.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_off00005d7e.bin
3873bc924eb15415eb3f9ec67cea0f46acadda8b206d25d954082cd293c1fc77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7E 5376 bytes
font_01_sfnt_off00006fb9.bin
69119a0ea67691f9da6d9549d527fb5ca6762defeccee0a2cd76d379fd440fd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB9 10152 bytes

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