Malicious PDF — malware analysis report

Static analysis result for SHA-256 e314a8414e2608cf…

MALICIOUS

PDF

72.7 KB Created: 2020-07-30 13:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3f3cd9cf97558d6d815a9d9d5c20490 SHA-1: fa659571e42453ba3012507db0f5b5cba3301ed8 SHA-256: e314a8414e2608cf9ed374cdaeb5b86da60b2f00de244ad10c55397dae5acd0d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on Shopify, suggesting an attempt to obscure the final malicious destination. The ML classifier also strongly indicates maliciousness. The document body is heavily obfuscated and unreadable, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

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=nikolai+gogol+diary+of+a+madman+pdf
    • http://files.yunkawasiperu.org/uploads/1/3/1/6/131606162/5685963.pdf
    • http://files.healthyforestcoalition.ca/uploads/1/3/0/8/130874143/f57d766ecdb9fe7.pdf
    • http://files.foscotecrafts.co.uk/uploads/1/3/1/8/131871424/mudidujaxinu.pdf
    • http://files.ilc.org.au/uploads/1/3/0/7/130776887/7270370.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/58711053963.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7471/files/5936934868.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/kekizazudamafet.pdf
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/27848927032.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/ganonisibowos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/74878724150.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/44825663611.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/48219388942.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/39205078301.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/54963620489.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/68452716489.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/jadademazunosi.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_off0000e1c5.bin
683ab018ec466a19b0b36f0f148a0fff74b553b22382ab63118d11cff8c1698b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 4908 bytes
font_01_sfnt_off0000f251.bin
8c5071dfa91b0baf6eed8b619f7da3708a4f846860fab5194eefda270450de56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 10232 bytes

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