Malicious PDF — malware analysis report

Static analysis result for SHA-256 75549cd66834e4ce…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 00:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02fdb79b2e8e16efb5e7f470002e86cf SHA-1: 49c041e5417f35e15b51be9d2dace5139287d4ee SHA-256: 75549cd66834e4ceee4a4bc85e2f7e85c6685910908c3ff4a072719d3a21c29d
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to its inclusion of a link farm with numerous external PDF links. One of these links, 'https://ttraff.cc/pify?keyword=physiology+of+hearing+and+balance+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify-hosted PDF links, suggesting a coordinated effort to lure users to malicious content.

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=physiology+of+hearing+and+balance+pdf
    • http://files.kwbcdeaf.com/uploads/1/3/0/7/130739987/wowajuxebaza_zorepukakar_rejebunevedif.pdf
    • http://files.stmatthewspokane.org/uploads/1/3/1/8/131857199/df8a314ccfcf8.pdf
    • http://puvofi.tlswindsled.com/uploads/1/3/1/6/131606490/besivusaribar.pdf
    • http://files.quieteroahu.com/uploads/1/3/2/6/132681476/6646347.pdf
    • http://files.nhwinterseniorsoftball.org/uploads/1/3/1/4/131414134/2420270.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/87322610750.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/dalipifosedixatijimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4470/files/poweredge_r740_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/nigovumusaxarudisoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/7160/1817/files/46592249955.pdf
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/risk_management_process_in_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/86697219086.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/actual_reading_ielts_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/210599405.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/airborne_disease_adalah.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_off00006684.bin
9f9bd8232c102461a1073dced6645e7c902b068e1399ddca17840faf3df18a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 5660 bytes
font_01_sfnt_off000079c7.bin
f814f80db3a1dc072dcca390d2a61a5cacfdc2e531b145eb25eda376b22f0b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 12124 bytes

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