Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d3aec25487ed51…

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 03:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0add1c687ec61903918ee08177d7e0ac SHA-1: 7cd4999c4a8f0564d174f6c1f083b47894f13e28 SHA-256: e9d3aec25487ed516c3ead9b649f48d51aaf21f953399ad3ee9877e799cd2d94
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to a medical condition, combined with what seems to be tool-generated content. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to Shopify domains, suggesting an attempt to disguise malicious links within a seemingly legitimate structure. The primary malicious IOC is the redirector URL.

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=carcinoma+de+celulas+escamosas+gatos+pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/lepiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/convert_jpg_to_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/didefagivuvosinugobuduv.pdf
    • https://cdn.shopify.com/s/files/1/0435/6902/1089/files/cardano_ada_wallet_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/heroes_and_generals_light_tank_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/6719994209.pdf
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/muvez.pdf
    • https://static.usrfiles.com/ugd/b88e3d_2ae9f8f475d84070bca13a72bf4cfaee.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6c97b325978480dbf153dd2a6de8c26.pdf
    • https://static.usrfiles.com/ugd/191a6d_a8023d2d51c249ceabd1343dfe38761d.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_4433459700704941900e2aa1e5257a7f.pdf
    • https://static.usrfiles.com/ugd/227d0f_1e65a9792e084ce792c4db491b7bfa27.pdf
    • https://static.usrfiles.com/ugd/3fc21f_2e11f49312434bc4901b9b134b9feae8.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_off000068cd.bin
35c0555209a1859b26512bcb49956f5c9a288e012d66155699c245c311404a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CD 5380 bytes
font_01_sfnt_off00007afd.bin
1435117068fb525f4fc2a1b4a59bcc84d8acf42a9d686d7aec34d610f689e246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 11304 bytes
font_02_sfnt_off00009f2f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.