Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e2eeb2d0631d2d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 19:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792c47432bf1c431fe02d8a212fb5bdb SHA-1: ff398f4951b3a3b75da824eb2eb1b167064fbf9d SHA-256: 13e2eeb2d0631d2dda2a9b9b9de2634cf7f4bb25620ee7205c1c7511be282a3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains numerous embedded URLs, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.cc/wix?keyword=mas+alla+de+los+sue%25C3%25B1os+pelicula+comp.

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/wix?keyword=mas+alla+de+los+sue%25C3%25B1os+pelicula+comp
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/38325407182.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/51885796803.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/graphic_design_book_in.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8b58bd82aa49dc92c738dd33a65d70.pdf
    • https://static.usrfiles.com/ugd/271e65_8210d0c52356481e8113fcea146e74d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_271cbeca9dab4340b6fc9ed23a2e7d22.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/sapemi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2460/5599/files/rovetedeniverokene.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/gta_san_andreas_remastered_pc_mod.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/gisupudapipiwuzetamivina.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048eb.bin
068c2d8cbd5ef3ce60aa937bb8fe565f3f38774e02798989784fb6969db19cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x48EB 5036 bytes
font_01_sfnt_off000059e5.bin
ede6c4c35489648841236152d8a1d7af714d37f4e160f250a7d599714b1f7b3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E5 10820 bytes
font_02_sfnt_off00007d4b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 4324 bytes