Malicious PDF — malware analysis report

Static analysis result for SHA-256 943804a2a6e206e8…

MALICIOUS

PDF

45.4 KB Created: 2020-08-29 02:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3d20216fd0e9d11d339898aed96042d SHA-1: 34dff75d6d36f9b3ea6bde56d725bbeaf4ac13be SHA-256: 943804a2a6e206e840d45c5f643cde7905dec10a5807142f52d37523f2cb68a1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com). This suggests a link farm or redirection attack. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the PDF structure itself indicates malicious intent through link manipulation.

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=sindrome+de+silla+turca+vacia
    • https://static.usrfiles.com/ugd/b8c837_c89056227e6f45a3a5d8eed9a9e47951.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e885859f7b641b4974a6b34ad3db0f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a646644c5434f4db710c691e3add968.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bc9f02fb3f44690aa5f951b8747ba9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4c0239534bb4abcb72b5598d5bb5b29.pdf
    • https://cdn.shopify.com/s/files/1/0441/0913/6024/files/across_time_and_death.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2034/files/pure_and_applied_additional_mathematics_sixth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/introduction_to_categorical_data_analysis_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/65308033076.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/anti_bullying_policy_in_school.pdf
    • https://cdn.shopify.com/s/files/1/0437/6307/3185/files/astrology_answers_daily_horoscope_virgo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/Auto_waschen_Vakuum_sex.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/fojilamub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/astm_b117_11.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/3454089640.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/kagakipumaxexetujumasewi.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_off00007063.bin
362b3db030ec511cd7e9d3ef0da3e8f971371332724f922023634eb8e40f58ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5248 bytes
font_01_sfnt_off0000821d.bin
1b178594c5fb6cb11758d81473e215a9ab96bff6b557794877d74fd38a951115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 11528 bytes

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