Malicious PDF — malware analysis report

Static analysis result for SHA-256 5992386d9b4dd2f9…

MALICIOUS

PDF

38.9 KB Created: 2020-08-22 18:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfe42e1f60fb8141912db4a3f167762f SHA-1: 47333a6f9e50e4abb8a46be9161de029c7242b85 SHA-256: 5992386d9b4dd2f90ae485894e905432c7f44261d7bbaab60acf3fabc8128910
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or redirection attack aimed at leading 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.com/pify?keyword=manual+ar+condicionado+carrier+x+power+inverter
    • http://files.regencybydesign.com/uploads/1/3/1/4/131482931/2143000.pdf
    • http://files.cleanwatergso.org/uploads/1/3/0/8/130814003/tapiwumetu_kasopigudani_dadasukur_fabamedazivajob.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/gawiwojen.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/36911387742.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/wuriligolonazapotubisik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73768917897.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/42238358561.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/tableau_tutorial_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/desmos_introduction_to_geometry_proofs_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/xajakibika.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_off00005c0a.bin
d2883b74f22998d140092d13b9ac508c3bc8d4599573fa39e15d0b5683c7ce88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0A 5112 bytes
font_01_sfnt_off00006d91.bin
02806c72472fd128620597d00d635547382dbabd4df2b1cc40a76419d2f7ac69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 9692 bytes

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