Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46cff2c449f58d2…

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 02:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ada9106d3bd443ae56d2ab27e781a610 SHA-1: 128e9aac218496f0d3ccddac734a45f5fb76063a SHA-256: c46cff2c449f58d23f8307c5f8c61adc758eb54990b4c40ea1195669fd2b284d
150 Risk Score

Malware Insights

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

The PDF document is designed to appear as a study guide answer key, but it contains a mass of embedded links. One of these links, 'https://ttraff.com/wix?keyword=jane+eyre+study+guide+answer+key', points to known malicious redirector infrastructure. The document's primary function is to act as a link farm, directing users to potentially harmful external sites.

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/wix?keyword=jane+eyre+study+guide+answer+key
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/nezefaludibomubomigip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/marriage_bio_data_template_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/corey_smith_the_baseball_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/spc_manual_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/toxegemuwak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8451/files/baofeng_bf_888s_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0449/9125/0590/files/phonological_awareness_test_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/gaxepumodamurizej.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/kijafigebosaxogovukedegop.pdf
    • https://cdn.shopify.com/s/files/1/0463/0862/2493/files/calculator_apps_hider.pdf
    • https://static.usrfiles.com/ugd/b8c837_3503e436e03d486db9ff2ef8d9ebfd65.pdf
    • https://static.usrfiles.com/ugd/b8c837_22d89e09ffd047df98b25af2dc1b2302.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_off00005972.bin
3e9a251876285007da9ebdda39f646616b7617bb019efe09e5161c7a3fc3aedb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5972 5208 bytes
font_01_sfnt_off00006b49.bin
757d9124643c27ab7907269e77fea89e946ab4f75ed0befa85a1e81cd57ad827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 10076 bytes

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