Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a330fb8b40589f…

MALICIOUS

PDF

39.1 KB Created: 2020-08-18 23:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe058b21f42aa9fa5af2b35090149ceb SHA-1: 8e748f9a381b4bbf8583ebf0b13b13f7b0203da9 SHA-256: 37a330fb8b40589fc8cc7e6c4a7b5d6b1811b81433db7f9e7661a1b9c46986ef
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for downloading an emulator. This suggests the PDF is designed to redirect users to malicious sites, likely for further exploitation or malware delivery.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=winkawaks+1.+60+emulator
    • http://vulamo.idrha1.com/uploads/1/3/1/4/131483492/nusiborezodegawexiv.pdf
    • http://files.dovergreekfestival.com/uploads/1/3/1/8/131871518/19385.pdf
    • http://files.tanoramaofconcord.com/uploads/1/3/1/3/131383760/546019d443.pdf
    • http://files.tylerdiscoverslife.com/uploads/1/3/2/6/132681080/xamumutidagix.pdf
    • http://files.kdgdistribution.com/uploads/1/3/2/6/132695306/togalasi_pivotinanulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/rocket_thrust.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/mumulinonaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/personal_training_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/78680567815.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/drop_primary_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/87335722918.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/jharkhand_b._ed_entrance_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/88265395328.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/960_fps_camera_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/30453518995.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/hospital_management_system_final_documentation_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/domanusosexit.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_off000059e0.bin
0fa4939c4b2906cd55bbd219afbcd9edba3f87c9c9fcbd9413bb04769f4b2105
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 5380 bytes
font_01_sfnt_off00006c30.bin
df8a1d8e3934110c68d3ba9b783ed73787e5a30f2d38caa5e07ec7a7e7c0d43c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C30 10388 bytes