Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a1bca0eda66def…

MALICIOUS

PDF

47.8 KB Created: 2020-09-02 01:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ebb3fb0d0d9f8e81a056423f0379c8 SHA-1: 729f5e20c8865073894bee4252bb266e206a0b35 SHA-256: 33a1bca0eda66def16878dc10c4409333feac533b758b8051a7a9dbfe3b855a6
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominent link directing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'free book report template for elementary students'. This indicates a social engineering tactic to drive users to malicious infrastructure.

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=free+book+report+template+for+elementary+students
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/let_her_go_piano_easy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6528/files/bootstrap_3_popover._js.pdf
    • https://cdn.shopify.com/s/files/1/0428/6326/3910/files/da_form_4610-_r.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/62469245776.pdf
    • https://static.usrfiles.com/ugd/10e3af_290bc3d49ca0491c8f19eb6eacf8c640.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_34b4d260e2e44f6595d67593dc0e37ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_582e8594b21e426ab2e43ed936f35e88.pdf
    • https://static.usrfiles.com/ugd/1a89c8_71db87a247aa4b06baac243006763d33.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/gatodulalejad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/divinity_2_jar_of_mind_maggots.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/36938989350.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/82076917878.pdf
    • https://static.usrfiles.com/ugd/b77b08_4267816a5f6d45a78a92a816c4e35a8a.pdf
    • https://static.usrfiles.com/ugd/0d2908_ccefa87c745c46b7aae890b601bc022a.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_off00007c86.bin
a7a677c505b404b3a46f38b22cd314a56c451915bcf5246fe78c681a8ec0f0d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C86 5448 bytes
font_01_sfnt_off00008f01.bin
266f881d7e2b9ec477f24a3e2468d575fa43c144d4ef17d39f1f85e34bf0bf15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F01 10224 bytes

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