Malicious PDF — malware analysis report

Static analysis result for SHA-256 b135756d6f326aa8…

MALICIOUS

PDF

56.6 KB Created: 2020-09-05 03:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97c87dd7d21fbb46393fad12fe05b5c0 SHA-1: 29c88d4f148cafb54f1ef829370ed1dbdebe5f3e SHA-256: b135756d6f326aa8ae911d142add878f80b503a13e213be2e8fe8c7b1f7cb02c
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that the heuristic identified as malicious. This suggests the PDF is designed to trick users into clicking the link, likely leading to a phishing or malware download site.

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.me/wix?keyword=marketing+research+and+information+system+pdf
    • https://cdn.shopify.com/s/files/1/0464/5784/7976/files/quimica_general_whitten.pdf
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/colligative_properties_freezing_point_depression_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0465/3252/6238/files/564398428.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86477918810.pdf
    • https://cdn.shopify.com/s/files/1/0446/9296/3484/files/14103023349.pdf
    • https://cdn.shopify.com/s/files/1/0428/7633/8335/files/bomisegufovoralej.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/92571002794.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/gumukagelura.pdf
    • https://cdn.shopify.com/s/files/1/0438/9457/1163/files/69932391245.pdf
    • https://cdn.shopify.com/s/files/1/0463/5607/0561/files/tutovakurip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/thompson_performance_powerblast_plate_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/79086252048.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/assignment_method_of_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/64971579049.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/vetibasifumoxanawod.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/lubisunixavoxufisema.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/72699151450.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/editable_rustic_wedding_invitation_templates.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/
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/9

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f3f.bin
f42683fc98d2688fc6f8b4cbd8fb95ea373125b3f88b743dc609a9492d4b80da
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3F 5708 bytes
font_01_sfnt_off0000b29e.bin
01668307c5cbdb18ab8348af1717e2876609d5bf8cb827799a2c27fb3bdee865
pdf-font-stream PDF embedded font (sfnt) at offset 0xB29E 10028 bytes