Malicious PDF — malware analysis report

Static analysis result for SHA-256 042a3a0b9fa1e906…

MALICIOUS

PDF

51.5 KB Created: 2020-08-30 22:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f52967a6bd08591a34dea8c53514f8 SHA-1: 79396aae654039d5fa32ce5daeb4df260fece9ba SHA-256: 042a3a0b9fa1e906197a62387191b5a42f32ec099588bff7d1543018ee17c7f5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=in+small+things+forgotten+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure the user to a harmful site.

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.ru/wix?keyword=in+small+things+forgotten+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/17170325255.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/kitazewuwab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/business_plan_process.pdf
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/58266397059.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2805/files/caitanya_bhagavata.pdf
    • https://cdn.shopify.com/s/files/1/0439/8913/9614/files/bohr_model_of_atom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/lettre_de_motivation_en_anglais_pour_universit.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/busabos_ng_palad.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/45998797408.pdf
    • https://static.usrfiles.com/ugd/930050_270e9aa3947d475797e32f39d2b62027.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab6f624208d14055b47fa3dfeb5fb1d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6be614b22c3548e18788740c7ce0d049.pdf
    • https://static.usrfiles.com/ugd/0d002d_f54ae51e05994cff91bfd32890d52560.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b2.bin
87b25d08118a0906fba9de379adf8738a99b85c9381573646a2578174eead1df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B2 5392 bytes
font_01_sfnt_off00007bc6.bin
2d1419103f7baca24c443a0fa032df32a06c37f6d2dc492a48115ae64bf378fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 2576 bytes
font_02_sfnt_off00008583.bin
0be8299fc7623d3a2e7cd5cc366f5859d91b786423d162abe7717232d77c9b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8583 10032 bytes
font_03_sfnt_off0000a784.bin
6f05fcc33dc372c65fe8ed4596c490c1c5fa3e30d289e41d945a04c13f239fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA784 16780 bytes

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