Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc84396d23fecc8…

MALICIOUS

PDF

43.0 KB Created: 2020-08-03 22:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502cb41ca0182cc9af30002f0940b798 SHA-1: 9ace07a588305b0db4e0cb3f2e988ed6dd3e536f SHA-256: ffc84396d23fecc805444b726aa2e9970fc5dcee56b81887b910d0c084a8fc6f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to distribute malicious content. The primary malicious URL identified is https://ttraff.com/pify?keyword=acls+bradycardia+pdf, which likely serves as a gateway to further malicious sites.

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=acls+bradycardia+pdf
    • http://files.carnegieartcornerstones.com/uploads/1/3/0/7/130738812/bb57de.pdf
    • http://moziv.mammothapogee.com/uploads/1/3/1/8/131856185/jabaratobiv-vutuxazafota.pdf
    • http://files.narsa-us.com/uploads/1/3/1/4/131437504/9054355.pdf
    • http://files.stjohnofgod.net/uploads/1/3/1/3/131382907/7924245.pdf
    • http://files.inneractalliance.org/uploads/1/3/0/8/130874599/18bd5.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/77415762932.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/fezeluwuruzuveruvezoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/22707180998.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/fisixejovasagisuzalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/52313711091.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/59245252930.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/2767984165.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/litemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/palm_trio_650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuxojusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/38549805063.pdf
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/zuzevugafewafepovivalux.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_off00006afb.bin
3177abbbf5773630ad28fed9adc6d94d29287269d67a252aa83fc468866c4da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFB 5380 bytes
font_01_sfnt_off00007d58.bin
634ef6aad091edc193b765df5e4823d067050bca6e7f4a247d9055221a07370b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D58 9972 bytes

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