Malicious PDF — malware analysis report

Static analysis result for SHA-256 03728046e0e96fe1…

MALICIOUS

PDF

50.9 KB Created: 2020-10-31 05:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1bb6519de5fa3db881ceff5d173fb15 SHA-1: 5b322660ab74770c539b522b227d344d3f4f5eed SHA-256: 03728046e0e96fe1dd4ef1388bf412bd3d5c5eaefa408dcb243b40b7e8ec7080
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The document body and embedded links suggest a tactic of creating numerous SEO-optimized PDF files to drive traffic to these redirectors. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?keyword=courageous+movie+online+free+youtube
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f95041c31326.pdf
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f91d29535efb.pdf
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f9c61265c3f3.pdf
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5f9a1a0118ba6.pdf
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f94c26b85c29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0495/9833/3092/files/79669877673.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/runescape_07_botting_guide.pdf
    • https://uploads.strikinglycdn.com/files/7c637ac6-ace7-46e5-b5b3-ba5951e32a2f/52025281691.pdf
    • https://uploads.strikinglycdn.com/files/c10acae3-c801-46bb-9005-245aac6b81a6/15861340085.pdf
    • https://uploads.strikinglycdn.com/files/75f5339e-aefb-434a-b88e-82cc75291fa1/john_deere_turf_gard_oil_equivalent.pdf
    • https://uploads.strikinglycdn.com/files/989c1527-400c-42f9-ba71-9483d04f544c/como_redactar_un_objetivo_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0506/4448/4250/files/pandigital_photo_scanner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0266/7970/5783/files/bayer_contour_glucose_meter_manual.pdf
    • https://uploads.strikinglycdn.com/files/56bd537f-7ee2-4ad5-a5d4-3f957967871d/medical_assistant_schools_in_michigan.pdf
    • https://cdn.shopify.com/s/files/1/0501/8661/7007/files/gewubananapagas.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000873b.bin
c6209a9e33b56d2ecf02b4841e865b9acf455780ea75a0ad586d0215b7cdc782
pdf-font-stream PDF embedded font (sfnt) at offset 0x873B 5292 bytes
font_01_sfnt_off00009935.bin
4b58fb5ddee9faab7d2f48e0d0f03cbebdfad87255831eb973931e4675c88975
pdf-font-stream PDF embedded font (sfnt) at offset 0x9935 11108 bytes