Malicious PDF — malware analysis report

Static analysis result for SHA-256 0540249b3a066891…

MALICIOUS

PDF

39.6 KB Created: 2020-09-08 01:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8936e4ff33cc6d7f3241896cb0c7738f SHA-1: 6c8d4459cdeaa58c2621fc8ab29c8f2632af24a7 SHA-256: 0540249b3a0668912239a03594f28b8b643386fb0b15cdaedb80740328b38f84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the same malicious URL, suggesting an attempt to direct users to malicious infrastructure. The presence of many Shopify links, some marked as benign, indicates a potential SEO link farm strategy to obscure the malicious destination.

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.me/wix?keyword=netbeans+for+jdk+12.+0.+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1855/0428/files/nintendo_ds_3d_emulator_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/37892883804.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/angular_flex_layout_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/1757/4299/files/hasir_boi_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/institute_of_hydrology_report_124.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/cuisinart_toaster_oven_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/fulamatuzikubawuza.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/jisepezunuto.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/49779582614.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/tudisujalabemaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/4923/6118/files/garen_jg_guide.pdf
    • https://static.usrfiles.com/ugd/ecec20_91fd8f8524984c7d9b5eb2c25711c574.pdf
    • https://static.usrfiles.com/ugd/29c71c_24f82ca5a25d4675b047d4acf444e376.pdf
    • https://static.usrfiles.com/ugd/c8a981_456b26a54c584fe0aa5e3a6dd62897a8.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_off000059f2.bin
5f1a29566c24d1200b3a1e322727bc34b4aa0d52ec6f758ed97655196fac8782
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F2 5476 bytes
font_01_sfnt_off00006cb6.bin
554e710bab4df165390ff547d1ff8aecf9cd9b6f9424d715f9a97fb048b8d9c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB6 10392 bytes