Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5ea363188c9649…

MALICIOUS

PDF

56.1 KB Created: 2020-08-19 15:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb0cd67b1cabdf083e352f0c7c0451e4 SHA-1: 940d8feaf3e4f93f208f0a604c911d18fb81bc84 SHA-256: 8f5ea363188c96498a007215d3e9f9a774b82e8c167522c2d16dd919c08a8ff4
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to `https://ttraff.com/pify?keyword=samsung+s7+edge+bootloader`, which is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The overall pattern suggests a phishing or scam attempt using a lure related to a popular electronic device.

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=samsung+s7+edge+bootloader
    • http://tezubut.feng-ge.net/uploads/1/3/0/9/130969723/muwotupoge.pdf
    • http://nojiv.basicbibleguide.org/uploads/1/3/1/3/131398020/luzidomulom.pdf
    • http://pivenon.aimuniversitycolorado.org/uploads/1/3/1/3/131383613/a5a0b73915d.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/xanenen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58829080427.pdf
    • https://cdn.shopify.com/s/files/1/0452/1938/1399/files/acidosis_alcalosis_respiratoria.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/42800472780.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/osteoporosis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/buxesanevitid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/81328593303.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_off000093c6.bin
477ae68e8e7df319bc0d705ff6c7fc5256e50d6d67917f6ab24ee4cab9335c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C6 5468 bytes
font_01_sfnt_off0000a63e.bin
aa703066cbf1be934bf7dd126907aaf134678621b3aac137b5df069de645cb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA63E 14748 bytes

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