Malicious PDF — malware analysis report

Static analysis result for SHA-256 478cb5ced5c92dc3…

MALICIOUS

PDF

43.5 KB Created: 2020-09-11 04:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9845654e0396152bcef5b32d7a09aa8a SHA-1: 6a705757b89cda4bc4d47bfa1fa513e795644030 SHA-256: 478cb5ced5c92dc39bee00174b8486ffa7575592ed40be7c0aad84351304eb43
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to potentially malicious websites. One critical heuristic specifically flagged a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the observed link farm behavior. No scripts were extracted from this sample.

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.club/wix?keyword=malayalam+fancy+fonts+free
    • http://wewuxevij.mastech-engineering.com/uploads/1/3/0/7/130739163/sorasixukipudazam.pdf
    • http://files.flyrgfa.com/uploads/1/3/1/3/131381428/248d5aef.pdf
    • http://files.happytea4u.com/uploads/1/3/1/8/131871424/mitoneroxu_kowewan_wuvurogijubire.pdf
    • http://nudemub.apollodrivingschoolhull.co.uk/uploads/1/3/1/4/131437299/ladubujomada.pdf
    • http://files.africananimalworld.com/uploads/1/3/0/8/130813362/topimadewez.pdf
    • http://files.photography-timeless.com/uploads/1/3/0/7/130775462/meresugukazope.pdf
    • http://files.checklistinspections.com/uploads/1/3/1/4/131405977/01d739fcf0ced.pdf
    • http://files.labyrinthe-montclar.com/uploads/1/3/2/6/132681891/bevixowan-xovoworukaluri-mideko-nojutenumojuji.pdf
    • http://nijug.hblts.co.nz/uploads/1/3/1/3/131379732/8ca70360.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/books_to_read_about_life.pdf
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/11293982808.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/kogadipifazaripesufekov.pdf
    • https://cdn.shopify.com/s/files/1/0438/2821/5968/files/probability_mass_function_cdf.pdf
    • https://cdn.shopify.com/s/files/1/0436/0044/5597/files/2mb_sample_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/sujigoguzividinanelederis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0901/files/japan_guide_osaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/7737/7958/files/airbrush_templates_stencils.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/body_image_lessons.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000548c.bin
243fa3fbe2f7ac4c571afe434de6f8396645b7e16f9fd7eba032fbb0f1113d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x548C 5136 bytes
font_01_sfnt_off000065ff.bin
4bb619f7e4c8d10c6650d66271e6db770d7def95493d885be3efe54e7c100c22
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 3048 bytes
font_02_sfnt_off0000720f.bin
47a7e91bae15ed1d7bb6883f9f63752b6fae3435c621306467ad1dc32c694ef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x720F 14432 bytes