Malicious PDF — malware analysis report

Static analysis result for SHA-256 344148e34cce7c30…

MALICIOUS

PDF

124.3 KB Created: 2020-08-30 11:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4325bc5cd3e25333c2a5f877d8c827c2 SHA-1: 45178f1ed8f1a369e1d4688c9ab565fac1be3f66 SHA-256: 344148e34cce7c30776573c92c3b2d6b4dc8343880aaf5c41ce1d6dd32c7d2bb
154 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a critical heuristic firing for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The embedded URL points to a redirector, which is likely intended to lead the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=de+la+ville+%25C3%25A0+cardiff+sable+de+barqu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/marov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/57950427267.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/31172097994.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65925238695.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/strength_of_materials_formulas_for_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0433/7867/1779/files/36197873785.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bewasovenajuwawofitef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/draw_the_zaitsev_product_formed_when_2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a603dc3220846d0981cb1715f1b9116.pdf
    • https://static.usrfiles.com/ugd/384ea4_59afe8b575c6445cb09b3d3331fe64f6.pdf
    • https://static.usrfiles.com/ugd/b4a829_c3f1db06a9004a67840a7ba080b3096a.pdf
    • https://cdn.shopify.com/s/files/1/0440/6027/8936/files/vojozisagek.pdf
    • https://cdn.shopify.com/s/files/1/0454/7867/4584/files/33604504606.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/wukuwuwakuwosugosiwowafib.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/biology_objective_questions_and_answers_for_competitive_exams.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/96385375284.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_off000182fb.bin
2b4a54b1a39a33ce887db96c4e40920c45c9cb05c8791bd94c4989dad3ef47ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182FB 5160 bytes
font_01_sfnt_off00019410.bin
839bf1010df86d5b23818765a2f0ce9988450cb4d76fd47b23ee7ea170ea5ce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19410 13596 bytes
font_02_sfnt_off0001be02.bin
6fffb1aeb89666cbcaec4ce24454e19e9ad5757041bd2745d7057949fb60916b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE02 16116 bytes
font_03_sfnt_off0001d2de.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2DE 4324 bytes

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