Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9734dc09071039…

MALICIOUS

PDF

38.1 KB Created: 2020-08-06 21:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c9ac71dcdc5b65c800f3203af9c1214 SHA-1: 822617a17118f363521ae71398cb7277a3406b8d SHA-256: 4a9734dc0907103954ac8765cfb0d11c248e6383958dd055290f0065cd141bf1
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, identified as a PDF SEO link farm. One of these links, https://ttraff.com/pify?keyword=attributes+in+dbms+pdf, points to a known malicious redirector. The document body is heavily obfuscated and contains remnants of the redirector URL, suggesting the primary purpose is to redirect users to malicious content or facilitate SEO manipulation for malicious purposes.

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=attributes+in+dbms+pdf
    • http://files.childrensbookweek.org/uploads/1/3/1/1/131164474/5281369.pdf
    • http://files.zepoloptimized.com/uploads/1/3/0/9/130970022/36802ad97f.pdf
    • http://files.ksuflashathon.com/uploads/1/3/1/4/131407692/194649.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/durham_county_inmate_population.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/wojulifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/pavotopelalovezopeluzefuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/maxuzelafuligitodad.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0710/files/57656028642.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/bavemegokoxop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/82780406778.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/22615957672.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/vuxatowalunajavajipep.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/tunazoxuruxalawozeta.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/lubetetexuwijije.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_off000059fa.bin
bf1987886188d1af986ecf115a39e5e934c663a3d607464097bf3e123c0cbe2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 5072 bytes
font_01_sfnt_off00006b1d.bin
2116b4eae3b3709048a4a55455c7adb9e0b53c7946efc6fcce1c675e22838490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 9628 bytes

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