Malicious PDF — malware analysis report

Static analysis result for SHA-256 4502054a85db185e…

MALICIOUS

PDF

35.4 KB Created: 2020-08-31 04:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2af907442e5598d3aa35d00df608e2d6 SHA-1: f5ae6d19fbcf50afe56a014543bda8a4e3f242df SHA-256: 4502054a85db185ef12e2b2afe37ddb5d0788bba42362877f100833f6487a05d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body mentions 'Aptoide tv android', suggesting a lure to download or install something related to this application. The presence of numerous links to PDF files hosted on Shopify and static.usrfiles.com, combined with the malicious redirector, indicates a link farm or redirection strategy to obscure the final malicious destination. No scripts were extracted from this sample.

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.com/wix?keyword=aptoide+tv+android
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/54580919716.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/mifurebivosarosivedafeluf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/chuyn_i_file_sang_file_nh_trc_tuyn.pdf
    • https://static.usrfiles.com/ugd/ab922d_38cc5871962d445b8153395b24777bb0.pdf
    • https://static.usrfiles.com/ugd/ac72e0_5a619139c0854cd8861c4cbc124362df.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_332a6af93cd74de2bd22bf25331e50f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_38b229dc1e31431aaf3ada771b33d3cc.pdf
    • https://static.usrfiles.com/ugd/b910ae_853335062ae448f1afa5123b0f56604c.pdf
    • https://static.usrfiles.com/ugd/a382ee_a3a2728559d840188a7d8086f97ec1f1.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_54708e58b1834222922aa2e1f799b588.pdf
    • https://static.usrfiles.com/ugd/b8c837_15d07be157fe4f33a5c57525b4b25485.pdf
    • https://static.usrfiles.com/ugd/fbccce_b688bab1f0904f4eb3112f0ce4aa0343.pdf
    • https://static.usrfiles.com/ugd/b8c837_608b274125884702a3938e1ac8db3600.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_off00004f62.bin
32fc09eaeed9b8726d4fa40cce56e7a2841653bfa6ae653f566e27c90e6a1f54
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F62 4792 bytes
font_01_sfnt_off00005fbe.bin
88b05f8a7127a15364eaf262dea12614397165b938301f2f3bf51c6e82eaa6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 9908 bytes