Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88eae1a38dc37b4…

MALICIOUS

PDF

47.5 KB Created: 2020-07-31 12:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c13ac7dac90cef22b15e9082d65576b5 SHA-1: 7c638bcf9fc294955ac2dbeb6701f534991a041d SHA-256: b88eae1a38dc37b4cef49c8de127b13735ba300a283dbb0b9af31b10b1ecc843
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is ttraff.com, which is known for redirecting to malicious content. The document body appears to be malformed or obfuscated, preventing a clear understanding of its direct lure, but the presence of numerous external links strongly suggests a redirection-based attack. No scripts were extracted from this sample.

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=glicina+neurotransmisor+funcion+pdf
    • http://files.southcliffcommunitygroup.com/uploads/1/3/0/7/130776883/lafafo.pdf
    • http://files.christophertsmith.com/uploads/1/3/1/4/131453555/2224318.pdf
    • http://files.fmhsabcmerchandise.com/uploads/1/3/0/8/130874316/zemez.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/24499358022.pdf
    • https://cdn.shopify.com/s/files/1/0435/2068/8282/files/56010579796.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/17613004741.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/72873831139.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/dededebevim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/6712495207.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/devorapamugebogulalovat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83406059157.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/buwopete.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_off00007ad1.bin
7083f6127648360e2e9afbb0e2e20c58dd9c1273d6e6866aebc4701fdb07ad68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 5216 bytes
font_01_sfnt_off00008c6c.bin
20ea8ae7ea22e791d19598478e6f3132472cc86d89547bb04c419f542484367d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6C 10748 bytes

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